Minnesota prosecutors have obtained key evidence in their investigations into the fatal shootings of Renee Good and Alex Pretti.
Massachusetts State Police said at least one person was left wounded after a gunman began shooting into traffic in Cambridge, Massachusetts, on Monday afternoon.
Trump's Republican administration alleges the ban violates the Constitution's Second Amendment right to bear arms.
Pirro said there is evidence that buckshot from a shotgun carried by alleged White House Correspondents' Dinner attacker was "intertwined with the fiber" of a bulletproof vest worn by a Secret Service officer.
Cole Allen, the suspect in the White House Correspondents' Association Dinner shooting, conceded to remain detained.
The first count of attempting to assassinate the president carries a maximum sentence of life in prison if convicted.