Rep. Ted Lieu (D-Calif.) ripped Speaker Paul Ryan Paul Davis RyanKenosha will be a good bellwether in 2020 At indoor rally, Pence says election runs through Wisconsin Juan Williams: Breaking down the debates MORE (R-Wis.) following a deadly shooting at a Waffle House in Tennessee on Sunday, asking when the retiring lawmaker will allow gun safety measures to be debated in Congress.

Dear @SpeakerRyan: At least 4 people died & multiple victims injured because a gunman used an assault weapon at a Waffle House. When will you stop silencing us & let us at least debate gun safety measures in Congress?



You're quitting. You no longer need to be beholden to @NRA. https://t.co/Iohzlumc95 — Ted Lieu (@tedlieu) April 22, 2018

Four people were killed and several others were injured after a gunman opened fire at a Waffle House near Nashville early Sunday.

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An assault-style rifle was used in the attack, authorities said.

Police are searching for a suspect, who remains at large.

Lieu also called for a gun control debate in Congress in February after the shooting at Marjory Stoneman Douglas High School in Parkland, Fla., which left 17 people dead.

"It makes no sense that someone can purchase assault rifles but not handguns. It also makes no sense that the shooter could not have purchased a beer legally but could still have purchased all of these assault rifles, and that's why we need to have gun reform," he said at the time.

"I think we're seeing an inflection point in American politics with the Parkland students speaking out, and the silent majority of Americans saying enough is enough, we need to have some common sense safety measures."