The justices said Tuesday they will take up appeals asking the court to strike down bans on the AR-15 and similar semiautomatic firearms in Connecticut and the Chicago area.
Two people charged in connection with a large-scale drug distribution and gun manufacturing operation in Northeast Philadelphia.
Trump's Republican administration alleges the ban violates the Constitution's Second Amendment right to bear arms.
Police say they found 13 handguns, two shotguns, and four rifles.
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.
The first count of attempting to assassinate the president carries a maximum sentence of life in prison if convicted.