Kelly took a dig at him during her program. So IMHO he was right to send a shot across her bow.
So Kelly got Trump in her head.
Take a look at @realDonaldTrumps immigration proposals: pic.twitter.com/F3phEpbQ74— Megyn Kelly (@megynkelly) August 25, 2015
She meant it as a slap, but it's backfired.
Trump is a counter puncher - he doesn’t start many fights but he finishes them.
What was the “dig”? I didn’t see it, but if Trump can’t handle someone challenging his proposals without resorting to childish tweets, then he really should stay in the private sector.