By Carrie Dann, Kelly ODonnell and Kasie Hunt

Despite an impassioned push by President Barack Obama and an emotional lobbying effort by the families of mass shooting victims, proponents of a compromise measure to expand gun background checks on Wednesday fell six votes short of passage in the Senate. The vote on the amendment was 54 to 46. Sixty votes were needed for the amendment to be adopted. Sen. Dianne Feinstein pushes for an assault weapons ban in the U.S. while speaking on the Senate floor Wednesday. The deal was the result of a deal struck between Republican Pat Toomey of Pennsylvania and Democrat Joe Manchin of West Virginia. It would have extended existing background check rules to gun sales made online and at gun shows.As the bill was defeated, Patricia Maisch — a survivor of the Tuscon shooting that targeted former congresswoman Gabby Giffords — yelled “Shame on you!” from the Senate gallery.

Read More In blow to gun control backers, background check compromise falls 6 votes short – First Read.