Four months after the massacre at a Connecticut elementary school, the gun-control proposal with arguably the best chance of passing through Congress went down to defeat. And in this case, a powerful gun lobby, coupled with 2014 campaign politics, trumped public opinion.

A bipartisan yet controversial proposal that would have extended current background checks for gun buyers to include gun shows and internet sales Wednesday fell six votes shy of the 60 needed in the Senate to advance through the chamber. The amendment by Democratic Sen. Joe Manchin of West Virginia and Republican Sen. Pat Toomey of Pennsylvania went down in defeat even though just about every national poll conducted the past couple of months indicated that the vast majority of Americans supported tougher background checks.

The most recent surveys included a CNN/ORC International poll released last week that indicated 86% of the public supported some form of background checks that are not currently required by law for gun sales, and an ABC News/Washington Post survey released Tuesday which indicated that 86% of Americans said they favored background checks for gun sales on the internet and at gun shows.