Thousands of people rallied on the National Mall and across the United States on Saturday in a renewed push for gun control measures after recent deadly mass shootings from Uvalde, Texas, to Buffalo, New York, that activists say should compel Congress to act.

“Enough is enough,” District of Columbia Mayor Muriel Bowser told the second March for Our Lives rally in her city. “I speak as a mayor, a mom, and I speak for millions of Americans and America’s mayors who are demanding that Congress do its job. And its job is to protect us, to protect our children from gun violence.”

According to the Associated Press, Speaker after speaker in Washington called on senators, who are seen as a major impediment to legislation, to act or face being voted out of office, especially given the shock to the nation’s conscience after 19 children and two teachers were killed May 24 at Robb Elementary School in Uvalde.

“If our government can’t do anything to stop 19 kids from being killed and slaughtered in their own school, and decapitated, it’s time to change who is in government,” said David Hogg, a survivor of the 2018 shooting that killed 17 students and staff at Marjory Stoneman Douglas High School in Parkland, Florida.

A co-founder of the March For Our Lives organization that was created after that shooting and held its first rally in Washington not long afterward, Hogg led the crowd in chants of “Vote them out.”

Another Parkland survivor and group co-founder, X Gonzalez, delivered an impassioned, profanity-laced plea to Congress for change. “We are being murdered,” they screamed and implored Congress to “act your age, not your shoe size.”

Added Yolanda King, granddaughter of Martin Luther King Jr.: “This time is different because this isn’t about politics. It’s about morality. Not right and left, but right and wrong, and that doesn’t just mean thoughts and prayers. That means courage and action.”