In the lower chamber’s first pivot toward crossing party lines in the debate over gun laws, Republican Reps. Scott Rigell (Va.) and Patrick Meehan (Pa.) joined Democratic Reps. Elijah Cummings (Md.) and Carolyn Maloney (N.Y.) on Tuesday to introduce a bill that would make it a felony to buy a gun with the intent to sell it to someone who is not able to legally purchase a firearm. . . .