This approach is so typically Trump it should be changed to a verb.  President Trump tweets about a phone call today with Russian President Vladimir Putin:
Note: “and even the “Russian Hoax”“; yeah, that part. Intentionally directed to send the DC democrats and media bananas.  He’s not trolling them, he’s toying with them. This dispatch is profoundly Trump; it’s like Andrew Breitbart saying “yeah, so?…”
The perfect blend of professionalism and back-handed antagonism. He’s toying with his opposition.  This is why Donald J Trump, the businessman, the disruptor, is effectively independent and uncontrollable by customs and norms.  He’s provoking…. and laughing…. and annoying….. and winning.