Former four-star general speculates whistleblower scandal could involve Trump giving Putin an American

It remains unclear exactly what were the issues cited by the whistleblower who expressed concern at actions of President Donald Trump as a threat to national security, at least one of which involved a promise the president allegedly made in a phone call with a foreign leader.

But former Gen. Barry McCaffrey had a chilling thought about what it could possibly be — and posted his speculation on Twitter: