Alva Review-Courier -

HOUSTON (AP) — A leaked intelligence document outlining alleged attempts by Russian military intelligence to hack into U.S. election systems is the latest evidence suggesting a broad and sophisticated foreign attack on the integrity of the nation's elections.

And it underscores the contention of security experts and computer scientists that the highly decentralized, often ramshackle U.S. election system remains profoundly vulnerable to trickery or sabotage .

The document, purportedly produced by the U.S. National Security Agency, does not indicate whether actual vote-tampering occurred. But it...