* For ongoing coverage of the explosions at the Boston Marathon, stay tuned to Washingtonpost.com.
EARLIER ON THE FIX:
WHAT YOU MIGHT HAVE MISSED:
Obama briefed on Boston explosions: President Obama addressed the nation from the White House briefing room Monday afternoon about the bomb explosions at the Boston Marathon, saying: "We still do not know who did this or why, and people shouldn’t jump to conclusions before we have all the facts." Obama added: "Make no mistake: We will get to the bottom of this. We will find out who did this and we will find out why they did this." Before addressing the nation, Obama spoke with Senate Minority Leader Mitch McConnell (R-Ky.) and House Speaker John A. Boehner (R-Ohio), according to aides.
Senate candidates suspend campaigns in Massachusetts: Several Massachusetts Senate candidates suspended their campaigns in response to the explosions in Boston. Republican candidate Gabriel Gomez, who ran in the marathon, was unharmed, his campaign said. “We are all OK. Watching the news at my apartment in the Back Bay,” Gomez spokesman Will Ritter wrote in an e-mail.
Manchin-Toomey update: The fate of the bipartisan gun compromise reached by Sens. Joe Manchin (D-W.Va.) and Pat Toomey (R-Pa.) remains in doubt, with a shrinking number of votes up for grabs. Sen. Kay Hagan (D-N.C.) said Monday she will support the measure. Meanwhile, three Republicans have committed to voting for it, while Sen. Dan Coats (R-Ind.) will not, nor will Sen. Saxby Chambliss (R-Ga.). "While I appreciate the good-faith effort of Senators Manchin and Toomey, I am concerned their legislation would result in more problems with our existing background check system and would not address the underlying issues with gun violence," Coats said in a statement.
Fundraising roundup: Sen. Marco Rubio (R-Fla.), who doesn't face reelection until 2016 and is a potential presidential candidate, raised nearly $2.3 million during the first quarter across three affiliated committees, finishing with roughly $2.3 million in the bank; former South Dakota governor Mike Rounds (R) raised just $184,000 during the first quarter for his Senate bid, banking $369,000; Newark Mayor Cory Booker's Democratic Senate exploratory committee raised a healthy $1.9 million and banked more than $1.6 million.
Morrison starts legal defense fund: Curtis Morrison, one of the two men accused of taping a private conversation at Senate Minority Leader Mitch McConnell's campaign office, has established a legal defense fund.
-- Zachary A. Goldfarb and Ed O'Keefe contributed to this post