Fears grow about patchwork US election system

Jenn McCullough wears a protective face mask as she steps from the voting booth Tuesday in Philadelphia. (AP Photos/Matt Rourke)

A voter, right, checks in with an election worker before casting her ballot in the Pennsylvania primary in Philadelphia, Tuesday.

ATLANTA — The chaos that plagued Georgia’s primary this week is raising concerns about a potential broader failure of the nation’s patchwork election system that could undermine the November presidential contest, political leaders and elections experts say.