“Each of these measures deserves a vote,” Holder said. “American people deserve this vote in spite of the pressure that the special interests and lobbyists are exerting in back rooms on our elected officials.”

The Senate is expected to take up gun control legislation soon, but Democrats and Republicans are still fighting over language in the bill that would toughed background checks on gun purchases. It is unclear whether Democrats have the 60 votes necessary to begin debate on the bill.

In a winding speech, Biden spoke of meeting with 13 Americans who lost family members in the Sandy Hook shooting earlier Tuesday. Biden, his voice raising at times, said he wished “the members of Congress had been able to eavesdrop on the discussion in my home.”

“Don't they understand?” Biden asked of his former Senate colleagues. “They're talking about filibustering, I mean what are they doing?”

Biden noted on two occasions that Senate Minority Leader Mitch McConnellMitch McConnellOpioid crisis threatens GOP ObamaCare repeal Trump making calls to senators on healthcare bill Trump called Cruz to press him on ObamaCare repeal bill: report MORE (Ky.) is among the senators who plan to filibuster. Biden and McConnell worked closely to pass the fiscal cliff bill several months ago.

Biden and Holder’s comments were the latest in a string of events intended to pressure the Senate on gun control.

President Obama on Monday spoke in Connecticut and met with relatives of the Sandy Hook victims. On Wednesday, first lady Michelle ObamaMichelle ObamaMichelle Obama holds fitness 'bootcamps' for friends Obama marks Father’s Day: ‘I'm most proud to be Sasha and Malia's dad’ Obamas invited to be honorary football coach at University of Michigan MORE is traveling to Chicago to speak about gun violence.