WASHINGTON (CBS) — A Democratic congressman says he will not take part in a moment of silence on the floor of the House of Representatives following the deadly mass shooting in Las Vegas.

Rep. Seth Moulton, D-Mass., tweeted Monday that it “becomes an excuse for inaction” on the lack of gun control laws in the United States.

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“As after Orlando, I will NOT be joining my colleagues in a moment of silence on the House Floor that just becomes an excuse for inaction,” said Moulton.

He continued, “Now is not a moment for silence; it’s a time for action.”

Moulton, an Iraq War veteran, also called out Speaker Paul Ryan.

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“@SpeakerRyan, how many Americans have to die before you do your job? Allow us to have a debate and a vote. You’re letting America down,” he tweeted.

Police say 64-year-old Stephen Paddock gunned down 58 people at a Las Vegas country festival after opening fire from a 32nd floor window at the Mandalay Bay. More than 500 people were injured.

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Police say Paddock killed himself right before they stormed they hotel room.

CBS News reports that Moulton is a potential contender for the 2020 Democratic presidential nomination.