Donald Trump is stirring up more hornets' nests with a barrage of terse and unexplained statements challenging political tradition, existing policy and the norms of diplomacy.

Historian Douglas Brinkley, referring to Trump's interviews with Bloomberg, CBS, and SiriusXM, told Politico Monday, "It seems to be among the most bizarre recent 24 hours in American presidential history. It was just surreal disarray and a confused mental state from the president."