WASHINGTON (AP) — President Donald Trump's threat to revoke the security clearances of top former officials critical of his administration left congressional leaders stunned and confused, with the House speaker shrugging it off as a bit of "trolling."

"I think he's just trolling people, honestly," Paul Ryan, R-Wis., told reporters Tuesday with a laugh.

Senate Majority Leader Mitch McConnell, R-Ky., was surprised to learn that many former top national security and intelligence officials maintain access to classified information after they leave their posts. But both GOP leaders were leaving the...