At least 20 people were killed in the violence, in which a gun battle followed a large explosion. No group claimed responsibility for the attack, but several analysts have noted that it resembles the operations of Al-Qaida.
The Senate Conservatives Fund, founded by then-Sen. Jim DeMint, is a big-money player targeting incumbent Republican senators including Minority Leader Mitch McConnell of Kentucky.
It's Day 4 of the White House's new messaging push for the Affordable Care Act. Today the goal is to tell the stories of people with pre-existing conditions who are now entitled to coverage under the new health care law.One such story comes from within the White House.