Speaker Nancy Pelosi Nancy PelosiDemocratic senator to party: 'A little message discipline wouldn't kill us' Overnight Health Care: New wave of COVID-19 cases builds in US | Florida to lift all coronavirus restrictions on restaurants, bars | Trump stirs questions with 0 drug coupon plan Overnight Defense: Appeals court revives House lawsuit against military funding for border wall | Dems push for limits on transferring military gear to police | Lawmakers ask for IG probe into Pentagon's use of COVID-19 funds MORE (D-Calif.) on Tuesday condemned Senate Majority Leader Mitch McConnell Addison (Mitch) Mitchell McConnellDemocratic senator to party: 'A little message discipline wouldn't kill us' House to vote on resolution affirming peaceful transition of power Republican lawyers brush off Trump's election comments MORE's failure (R-Ky.) to bring up meaningful gun legislation in the upper chamber, arguing that "people are dying" because of his refusal.

"Lives are at stake. Sen. McConnell is standing in the way," Pelosi told reporters in Washington, noting that the House made an effort to address gun violence by passing legislation in February to extend background checks to all gun sales.

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The Speaker's comments came after being asked if she had any regrets about not calling the lower chamber back into session early from summer recess following the string of mass shootings last month. Pelosi became noticeably irritated by the question, insisting that House lawmakers had already done their job.

"Members had events all over the country to ask [McConnell] to bring up the bill. Don’t ask me what we haven’t done. We have done it," she said. "And if you are annoyed with my impatience, it’s because people are dying because Sen. McConnell hasn’t acted. Why don’t you go ask him if he has any regrets for all the people who died because he hasn’t?”

Pressed on congressional response on gun violence, Speaker Pelosi says, "Senator McConnell hasn't acted. Why don't you go ask him if he has any regrets for all the people who died because he hasn't acted?" https://t.co/HybFX2GM5S pic.twitter.com/v2DGQcRhb8 — ABC News (@ABC) September 10, 2019

Congress reconvened earlier this week following a month in which mass shootings led to the deaths of 53 people, according to The New York Times. The massacres have led to renewed calls from Democrats for Congress to reform the nation's gun laws.

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McConnell has said that he will only bring up gun legislation in the Senate if it is guaranteed to be signed by. He told reporters on Tuesday that the White House was preparing a proposal to address the “horrendous” shootings in August.

"They are working on coming up with a proposal that the president will sign. Until that happens, all of this is theatrics,” McConnell said.

He also dismissed calls from Pelosi and Senate Minority Leader Charles Schumer Chuck SchumerPelosi slams Trump executive order on pre-existing conditions: It 'isn't worth the paper it's signed on' 3 reasons why Biden is misreading the politics of court packing Cruz blocks amended resolution honoring Ginsburg over language about her dying wish MORE (D-N.Y.) to take up the House-passed gun control measure. He derided the effort as a "stunt" since Trump has already said he would veto the legislation.

The House in February passed legislation that would require all gun sellers to conduct background checks on people purchasing firearms. Pelosi said Monday that there would be “hell to pay” for Senate Republicans if they didn't pass the bill.