Fred Guttenberg, who lost his daughter in the Parkland school shooting, urged GOP lawmakers to either join Democrats in their gun control efforts or resign.
"There's consequences when you divide, when you try to push people apart. There are going to be others who take that to another level," Fred Guttenberg said.
"Young people marched, we voted, we did what was asked of us. It's time for the President to deliver for us," Parkland survivor David Hogg said on Monday.
"I'd like to be able to move on from ever thinking of him again," said Guttenberg, whose 14-year-old daughter died in the 2018 school shooting in Florida.
Guttenberg has become deeply involved in activism since losing his 14-year-old daughter, Jaime Guttenberg, in the 2018 Parkland, Florida, shooting.
Fred Guttenberg criticized Nikolas Cruz's decision to not plead guilty sooner, saying it put his family and others "through hell" for years.
"Silence is complicity, and they are silent," Fred Guttenberg said of Republican leaders who haven't spoken out against Greene.
"You are wrong and either showing a lack of understanding or something more intentional veering on anti Semitism," Guttenberg told Representative Alexandria Ocasio-Cortez on Twitter.
Gutternberg's message came hours after a gunman killed eight people at a FedEx facility in Indianapolis.
"Today you should be a senior in school. We should be celebrating love," Fred Guttenberg wrote in a Twitter thread marking the third anniversary of his 14-year-old daughter's murder.
Fred Guttenberg, who lost his daughter in the Parkland school shooting, said he was overcome with emotion when shouting out at President Donald Trump's address.
Security quickly moved to escort Guttenberg out of the chamber as Trump defended the Second Amendment, Newsweek can confirm.
"Putting out a tweet like this, full of your BS on a day when 3 children died is disgusting @senatemajldr," Fred Guttenberg wrote.
"Under what scenario could somebody think this was a good idea? This has me so upset," Fred Guttenberg tweeted.
"You are using the pain of the victims of gun violence to speak in a way that allows you to look like you're going to do something but only to play games with their emotions," Fred Guttenberg said.
"To try and suggest that a wall on the southern border would have saved my daughter's life just makes him an inept representative," Fred Guttenberg said.
"Please, come at me. Attack me with your stupid words, because you're pro-life," Scarborough said to the pro-life community.
"The judge recognized the man and the gesture. He does nothing. Turns away. And then security escorts him," Cuomo said.
An encounter caught on video showed a man arguing with Milano while another man accused her of being a "hypocrite" for having armed security.
"There's nothing else I think about wanting to do," said Fred Guttenberg. "There's nothing else I care about."