Schumer, the Senate minority leader, has criticized O'Rourke's plan for mandatory assault weapon buybacks.
Tom Sullivan, the father of one of the 2012 theater shooting victims, introduced the Democratic presidential candidate at a rally on Thursday.
The company says low demand is behind its decision to suspend production and sales of the gun to civilians.
It may go nowhere because President Donald Trump hasn't signed off on it yet.
The two 2020 presidential candidates are sparring over making mandatory buybacks on assault rifles part of Democrats' push for stricter gun control laws.
Democrats have long contended their support for gun control laws doesn't mean they want to take away law-abiding citizen's firearms.
Texas state Rep. Briscoe Cain is facing a potential FBI investigation over a menacing message he sent to the Democratic presidential candidate.
But no, it would not mean "federal agents knocking on doors," the Democratic presidential candidate said.
O'Rourke called the tweet from Briscoe Cain a "death threat," and his campaign is reporting it to the FBI.
The heads of companies like Twitter, Uber, Lyft, Airbnb and Reddit want lawmakers to expand background checks and strengthen "red flag" laws.
Former Rep. Gabby Giffords will bring 11 gun safety advocates and shooting survivors to the debate. Six are survivors of the massacre in El Paso, Texas.
The president is expected to receive a briefing Thursday on potential gun control proposals. He's keeping everyone guessing whether he'll back any of them.
Polling shows the party’s voters back ambitious proposals from 2020 presidential candidates. But members of Congress are more cautious.
Eight presidential candidates put their differences aside for a common goal.
The president is expected to be briefed on potential gun control proposals this week.
The House speaker warned the Senate majority leader that Democrats aren't backing down on the matter.
Gov. Greg Abbott, an avid gun-rights supporter, avoided taking any action around gun purchases.
Jaboukie Young-White thinks harnessing gun nuts' toxic masculinity and using it against them is the best plan of action.
The newspaper listed the names of hundreds of victims of mass shootings to urge the Senate majority leader to "do something."