Sen. Coburn: Gun bill will make it to a vote

The U.S. Senate will vote on new legislation on Thursday, setting up a fierce debate over our nation's gun laws. More than a dozen conservative Republicans have vowed to block the bill with a filibuster, but that's not deterring Vice President Joe Biden.

"I promise you we are going to win this fight. We are going to win this fight. This is not going away. This is not one of these votes if they block a vote that somehow we are going to go away. The American public will not stand for it," Biden said.

OutFront tonight: Senator Tom Coburn, Republican of Oklahoma who is a player in negotiating a bipartisan agreement on background checks.

He's a pro-gun Republican with an A rating from the NRA and an A+ from the Gun Owners of America. But he's also been called the key to the President's agenda on gun control.