Romney's speech to the Veterans of Foreign Wars national convention in Reno aims to paint Obama as weak on national security and naïve on foreign policy, two areas where Obama has consistently polled higher than his opponent.

The remarks come one day after a top Senate Democrat said some of the leaks came from the White House, a suggestion Obama had dismissed as “offensive” when it was coming only from Republicans.

“It is not enough to say the matter is being looked into, and leave it at that,” Romney said. “When the issue is the political use of highly sensitive national security information, it is unacceptable to say, ‘We’ll report our findings after Election Day.' ”

Read more on The Hill's Global Affairs blog.