-- National security officials are preparing for the possibility that they could lose the legal authority to conduct bulk data collection programs as Congressional Republicans remain divided over the PATRIOT Act. Senate Majority Leader Mitch McConnell said he'll allow a vote on a House-passed measure that reforms the program, even though he favors a long-term extension of the existing program. McConnell said he doesn't think the House version has 60 votes in the Senate, making a short-term extension possible. The Act's Section 215 expires on June 1. (Washington Post)

-- Iranian supreme leader Ayatollah Ali Khamenei said Wednesday his country would not allow international weapons inspectors to interview Iran's nuclear scientists. His comments come a month after he said Iran wouldn't allow military sites to be inspected, either. Iran hasn't answered questions over research into explosives and neutron calculations, which could be applicable to building a nuclear bomb. Negotiations between the E.U. and Iran are taking place this week in Vienna. (Reuters)

-- The House on Tuesday backed a two-month extension of the Highway Trust Fund in a broad bipartisan vote just a week and a half before the fund would have run out of money. The Senate has just two legislative days before the Memorial Day break to act. The last major highway bill expired in 2009; Transportation Secretary Anthony Foxx said this would mark the 33rd short-term extension in recent years. House Majority Leader Kevin McCarthy said he wants to pair a long-term highway bill with tax reform. (New York Times)

-- President Obama will connect climate change to national security in a commencement address at the Coast Guard Academy on Wednesday. Obama will tell graduates that rising seas present new challenges to U.S. military personnel, and that higher sea levels alone could cost the country $200 billion. (Washington Post)

-- House Intelligence Committee ranking member Adam Schiff (D-Calif.) on Tuesday said the Obama administration's descriptions of progress against the Islamic State should ring "alarm bells" after militants captured Ramadi over the weekend. "I don't think we're losing the war, but I don't think we're making tremendous progress either," Schiff said at a Christian Science Monitor breakfast. (Yahoo News)

-- A ruptured pipeline near Santa Barbara spilled an estimated 21,000 gallons of crude oil on Tuesday. Oil coated beaches and created a four-mile sheen in the Pacific, officials said, though the Coast Guard stopped the leak by mid-afternoon. The pipeline is owned by Houston-based Plains All American Pipeline. (Los Angeles Times)

-- The House Benghazi Committee formally subpoenaed former White House adviser Sidney Blumenthal over advice he gave to Hillary Clinton on Libya. The subpoena demands Blumenthal appear before the committee on June 3. Emails between Blumenthal and Clinton, which eventually made their way to other State Department officials, are among the 300 or so messages about Libya the department has turned over to Gowdy's committee. (Reuters)

-- Former Delaware Attorney General Beau Biden is undergoing treatment at Walter Reed National Military Medical Center, the Vice President's office said Tuesday. The office wouldn't elaborate on why he's there. Just a few weeks ago, his law firm said Beau Biden would expand his work with whistleblower clients. (ABC News)

-- Front Pages: WaPo and USA Today lead with Takata's unprecedented 34 million-vehicle recall over unsafe airbags. LA Times banners the city's big wage hike (see below), and NYT leads with the city council's vote. (WSJ reports on six Chinese professors accused of stealing technology from U.S. companies.

White House 2016

-- Clinton: Hillary Clinton's first formal rally, complete with big-picture speech in front of a roaring crowd, is being pushed back until at least June to give the campaign more time to raise money and develop policy positions. Clinton will stick to small, private meetings over the next few weeks; she'll be in South Carolina and Florida next week. Stops in Texas and Missouri are also on the calendar. (Politico)

-- More Clinton: Clinton's top State Department staffers scrutinized politically sensitive documents requested under FOIA laws and blocked the release of some of those documents. Chief of staff Cheryl Mills asked to see all documents on the Keystone XL pipeline and demanded that some be withheld, and she negotiated with records specialists over documents about Bill Clinton's speaking engagements. (Wall Street Journal) A U.S. District Court judge ordered the State Department to propose a new schedule for rolling out Clinton's emails over time, rather than in a giant dump in February. (Politico)

-- Jindal: Louisiana Gov. Bobby Jindal (R) said he will issue an executive order to enforce the intent of a religious freedom bill that would have allowed business owners to discriminate against gays and lesbians based on their personal beliefs. The religious freedom bill died in a legislative committee on Tuesday. (New Orleans Times-Picayune)

-- Chafee: Former Rhode Island Gov. Lincoln Chafee (D) says he's likely to launch his campaign before mid-June. He visited Democrats in Concord on Tuesday, his second trip to New Hampshire in the past month. Chafee also said he would vote in favor of trade promotion authority legislation currently before the Senate. (NH1)

-- Republicans: GOP primary voters like their choices in the 2016 primary more than they did at comparable points in 2008 and 2012. This year, 57 percent of Republican voters say they have an excellent or good impression of those running for the nomination, 13 points higher than in May 2011 and seven points higher than in 2007. Conservative voters tend to rate GOP candidates more favorably than those who call themselves moderate or liberal Republicans. (Pew Research Center)

Outside The Beltway:

-- Kentucky: Venture capitalist Matt Bevin (R) leads Agriculture Commissioner James Comer (R) by just 83 votes out of 214,000 cast on Election Day, a margin slim enough that Comer is asking for a recanvass, in which the Secretary of State's office checks printed vote totals against data sent to the state Board of Elections. That process will happen on May 28. A recount would be the next step. The eventual winner will face Attorney General Jack Conway (D), who didn't have any real competition. (Lexington Herald-Leader)

-- California: The Los Angeles City Council voted Tuesday to increase its minimum wage to $15 an hour by 2020, in a 14-1 vote. The increase is likely to have a disproportionate impact in L.A., where almost half the workforce earns less than $15 an hour. San Francisco and Seattle have already passed $15 wage laws. (New York Times, Los Angeles Times)

-- Florida: Former state GOP chairman Lenny Curry (R) narrowly ousted Jacksonville Mayor Alvin Brown (D) on Tuesday, marking just the second time in recent history that a sitting mayor has lost re-election. Democratic turnout dropped slightly from 2011, when Brown became the city's first African American mayor, but Republican turnout spiked from 81,000 in 2011 to 87,000 on Tuesday, a sizable boost that helped Curry win 51 percent to 48 percent. (Florida Times-Union) That makes Jacksonville the second-largest city in the country to be run by a Republican mayor, after San Diego.

-- Indiana: Gov. Mike Pence (R) will announce next month he's seeking re-election, rather than running for president. Indiana Republican Party chairman Jeff Cardwell said Pence will make his announcement at the party's annual fundraising dinner in June. (Indianapolis Star)

-- Pennsylvania: City councilman James Kenney (D) took 56 percent of the vote, easily outpacing five other candidates to win the Democratic nomination for mayor, making him the overwhelming favorite in November. Kenney, who is white, won big among African Americans, too. Philadelphia hasn't elected a Republican mayor since 1951. Incumbent Mayor Michael Nutter (D) is term-limited out of office. (Philadelphia Inquirer)

DC Digest

-- President Obama travels to New London, Conn., this morning to deliver the commencement address at the Coast Guard Academy. He'll hop over to Stamford, Conn., for a DNC fundraiser, before heading back to D.C. tonight.

-- Vice President Biden has meetings at the White House all day today.

-- The House meets at 10 a.m. for morning business before debating two research and development measures on the floor today. First votes are expected between 1:15 and 2:15, with last votes coming by 7 p.m.

-- The Senate meets at 9:30 a.m. to continue considering trade promotion authority and trade adjustment assistance measures. Eight amendments are pending, and McConnell has filed cloture on the bill, setting up a cloture vote an hour after the Senate convenes on Thursday.

-- The House voted overwhelmingly on Tuesday for legislation that would allow sledding on Capitol Hill when it snows. Capitol Police said existing law requires them to ban sledding for security reasons, but language in the legislative branch appropriations measure urges them to ease up on kids who show up with sleds. (Washington Post) Are the 67 members who voted against the approps bill anti-sledding?

Business, Politics and the Business of Politics

-- The Federal Trade Commission has accused four cancer charities of misusing part of the $187 million they had collectively raised, on everything from meals at Hooters to jet skis and Caribbean cruises. Investigators said the charities, Cancer Support Services, Children's Cancer Fund of America, the Breast Cancer Society and the Cancer Fund of America collectively spent just 3 percent of the donations they received on actual cancer patients. (Washington Post, New York Times)

-- Stock futures are flat this morning after a pretty unremarkable day on Wall Street on Tuesday. Asian and European shares are mixed today. (CNN)

Long Reads

-- Bye Bye Dave: David Letterman signs off tonight after more than 6,000 shows over his 34-year run on NBC and CBS. "He has done all he can in the face of so much stupidity, often by pretending to the stupidest one of all. There came a point — and Letterman saw it, you have to believe that he saw it — where his style, his aw-shucks approach was no longer effective against so much noise and trash," writes Post TV critic Hank Stuever. (Washington Post) All news is local: "Oregon's brushes with David Letterman Top 10 List greatness," from The Oregonian.

-- "The Bay Area is obsessed with food," author Joyce Goldstein says. And Tom Sietsema is right there with them: "From touchdown, no other city in the country whets my appetite like San Francisco." Check out his exhaustive tour of the City here. Though, Tom, we await your input on the phenomenon of $4 toast, which may herald the end of civilization as we know it.

-- Headline of the Day: "Burnt pizza crust causes emergency evacuation at Iowa Capitol." (Des Moines Register)