 Hours after these terrifying moments at former President Donald Trump's campaign rally this weekend, federal lawmakers are now demanding answers. Get to the bottom of what happened, whatever lapses occurred. Make sure that if somebody has to be held accountable, that there's an opportunity to do so. Both Democrats and Republicans have sent letters to the leaders of the U.S. Secret Service and the Department of Homeland Security. They want them to testify before Congress. And in some cases, lawmakers are requesting documents about the security plans for the event.