Senate Majority Whip Dick Durbin (D-IL) told reporters Thursday that requiring universal background checks is the gun control proposal that's most likely to pass, and called the assault weapons ban "the toughest part" of the package.
"I think the strength of the argument is behind universal background checks," he said. "I think there's also strength in dealing with mental health records -- I think that that is an emerging bipartisan belief. I'd say next in line would be these large clips and cartidges and drums, as to whether there should be some limitation there. I support the assault weapons ban. I think right now it is probably the toughest part of this conversation."