Looking ahead to the 2014 congressional elections, he added, "If this Congress refuses to listen to the American people and pass common-sense gun legislation, then the real impact is going to have to come from the voters."
Obama blamed lawmakers' fear that "the gun lobby would spend a lot of money" and accuse them of opposing the Second Amendment's right to bear arms.
A spokesman, Josh earnest, told reporters on Thursday, "we're pretty close to a consensus on this just about everywhere except in the United States Congress. And as the President alluded to yesterday, I think that is an indication of the pernicious influence that some special interests have in the United States Congress. And that is going to require a vocalization of public opinion to overcome it."
Emotions were high on Wednesday at the Capitol.
When the background check amendment failed in the Senate, Patricia Maisch, watching from a visitors' gallery, shouted "Shame on you!" Maisch helped restrain the gunman at the 2011 Tucson shooting in which six people died and 13, including Giffords, were wounded.
Associated Press writers Donna Cassata, Laurie Kellman, Richard Lardner and Andrew Taylor contributed to this report.
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