Apr 14, 2013 3:57 PM by Associated Press
WASHINGTON - A bipartisan Senate proposal to expand background checks for gun buyers has gained the backing of one Republican and the potential support of a second today.
Maine Sen. Susan Collins says plan would "strengthen the background check system without in any way infringing on Second Amendment rights," while Arizona Sen. John McCain, who has a B+ rating from the National Rifle Association, says he's "very favorably disposed" to the proposal.
The proposal is from Republican Patrick Toomey of Pennsylvania and Democrat Joe Manchin of West Virginia, and they say it's shaping up as a close call.
Toomey says a vote could come as early as Wednesday.
They appeared on CNN's "State of the Union" and CBS' "Face the Nation." McCain was on CNN.