Does Donald Trump Owe John McCain An Apology?

The big political debate that is descending upon Washington Monday may have nothing to do with legislation, but rather whether Donald Trump owes Sen. John McCain an apology.

His comments about the senator have seemingly riled both sides of the aisle, and we’ll see whether McCain’s colleagues on Capitol Hill take the bait and weigh in on the matter.

Also in Congress, the Iran deal was delivered Sunday, and that 60-day clock officially starts ticking for legislators to decide whether the deal stands.

ABC’s Mary Bruce joined us from Washington DC to discuss.