On the floor of the U.S. House on Monday, a handful of Democrats shouted, “Where’s the bill?” as House Speaker Paul Ryan (R-Wisconsin) introduced a moment of silence for the victims of the Orlando shooting.

South Carolina Rep. Jim Clyburn, the number 3 Democrat in the House, attempted to ask Ryan when the chamber would debate gun control legislation, but Ryan interrupted the question with a gavel and directed lawmakers to proceed with an unrelated vote.

“I think people are frustrated that all we do in response to these terrible atrocities is take 10 seconds to have a moment of silence,” said Rep. Jim McGovern (D-Mass.).

Earlier in the day, the party’s presumptive presidential nominee Hillary Clinton reiterated a call for an assault weapons ban, calling them a “weapon of war.”

“I believe strongly that commonsense gun safety reform across our country would make a difference,” Clinton said.

However, Democrats’ frustration with the lack of action on gun control belies a history of passiveness on that very issue. After the 1994 Federal Assault Weapons Ban signed into law by President Bill Clinton expired 10 years later, Democrats made largely no effort to renew it. President Barack Obama in 2008 outlined a proposal to make the legislation permanent, and another concerted push to ban assault weapons arose after the Sandy Hook shooting in December 2012, but Congress repeatedly refused to take action on any of those or other measures.

The Washington Post writes, “The first decade after the ban expired suggested that its political potency had run out. In 2013, Sen. Dianne Feinstein (D-Calif.) offered a modified assault weapons ban as part of the doomed post-Newtown gun safety package. It won just 40 votes, losing 15 Democrats, mostly from Western states and red states.”

And despite other measures like the Brady Handgun Violence Prevention Act, also signed in 1994, gun sales have continued to climb and gun violence remains widespread, with a 2016 National Institutes of Health study finding that the U.S., home to five percent of the world’s population, has 31 percent of all public mass shootings. And as CNBC reported on Monday, shares in gun manufacturers Smith & Wesson and Sturm Ruger jumped 6.9 percent and 8.5 percent, respectively, following the Orlando shooting.