Cliff Sims, former director of White House message strategy, sat down with Mike Allen and me for "Axios on HBO" and described what it's like sitting with @realDonaldTrump while he tweets.

Sims, who left the White House in May, said he's seen Trump dictate tweets to aides from the Oval Office or from the private dining room that adjoins it. "He's meticulous with not just the words that he wants to use but the punctuation," Sims said. "So he'll say, you know, 'Jonathan Swan at Axios is an awful terrible reporter dash dash capital S capital A capital D exclamation point.'"