* With Americans for Prosperity launching new ads hitting Dem Members of Congress in New Hampshire, Sabrina Siddiqui reports that both Obamacare victims in the spots are local GOP donors and activists.

Reminder: Even as many Obamacare victimology stories in the group’s ads are hyped, distorted or feature GOP operatives or actors, AFP is running campaigns in at least two states designed to block the Medicaid expansion from benefitting untold numbers of real people.

* Steny Hoyer, the number two House Democrat, is giving some advice to his fellow Dems about the politics of Obamacare that has Republicans scoffing today:

“The Affordable Care Act is ours,” Hoyer said when asked what advice he’d give to potentially vulnerable House Democrats grappling with the issue in the midterm elections. “You’re not going to hide. You’re not going to duck. It is ours. We promoted it. We believe in it. Sell it. It is good for the country.”

The real story here is that, while some Dems are shading more heavily towards demanding fixes than others, and some are pressing Republicans over the consequences of repeal harder than others, in reality most Dems really are standing behind the law’s core goals.

* Dylan Scott reports that conservatives are holding out so adamantly against Medicaid expansions in Virginia and Arkansas that the result could be … state government shutdowns. Sound familiar? It’s a reminder pockets of resistance remain fierce even in states (like Virginia) that just decided an election partly on the expansion.

* Jeremy Peters has an interesting look at the surprisingly high number of GOP Congressional leaders who are facing primaries from the right. You’ll be startled to hear that many of them cite Ted Cruz as their inspiration.

* With Dem Rep. John Dingell announcing his retirement today, here’s Jonathan Bernstein on why his longevity and productivity are worth celebrating.

* Alec MacGillis on the other side of Dingell’s career: “There is simply no overstating how destructive Dingell was to the prospects for sensible gun regulation in this country.”

* Oh, by the way, liberal tweeter @LOLGOP is talking about running for Dingell’s seat, and I’m told he’s really thinking about it.

* Zack Ford tallies up the latest in the mounting opposition to the controversial “license to discriminate” bill in Arizona, which is now opposed by both John McCain and Jeff Flake, and as Ford notes, it seems likely Governor Jan Brewer will veto the measure, on the grounds that it could hurt the state’s economy.

* Marriott is now urging a veto, too, and so is American Airlines.

* Jonathan Chait on why Bill Clinton can compete in Kentucky and Barack Obama can’t.

* An interesting finding in a new study from Pew Research:

If a topic is political, it is common to see two separate, polarized crowds take shape. They form two distinct discussion groups that mostly do not interact with each other. Frequently these are recognizably liberal or conservative groups. The participants within each separate group commonly mention very different collections of website URLs and use distinct hashtags and words. The split is clearly evident in many highly controversial discussions: people in clusters that we identified as liberal used URLs for mainstream news websites, while groups we identified as conservative used links to conservative news websites and commentary sources.

Did somebody say “conservative closed information feedback loop”?

* Howie Klein on an interesting schism between conservative and progressive Dems in California, and how it’s resonating right up to Dem leadership levels.

* And Tim Murphy brings us a brief history of politicians accidentally shooting things.

Greg Sargent writes The Plum Line blog, a reported opinion blog with a liberal slant -- what you might call “opinionated reporting” from the left.