 House lawmakers want answers. I'm Dave Anthony, Fox News, getting briefings today from the Secret Service on the Trump assassination attempt. Congresswoman Nancy Mace tells Fox police knew a suspicious person was on a rooftop at Saturday's rally. How is this even possible? We've all seen the interviews of citizens on the ground, rally goers who saw it, reported it. Investigators are still trying to figure out why gunman Thomas Matthew Crooks, killed by Secret Service, targeted the former president. Fox's David Spunt reports they've conducted more than a