Some skeptics have suggested that Donald Trump is a Democratic plant in the 2016 presidential race -- that he's there for the specific purpose of wrecking the Republican Party's prospects on behalf of his good friends, the Clintons.
Heck, I don't write off that possibility. In fact, I just noticed, while doing some vanity Googling, that I suggested the idea myself ...
... In 2011!
And whaddayaknow, he's even following a variant of the same strategy this year that he followed in 2011-2012, only this time aiming his "birther" stuff in the other direction, at a Republican (Ted Cruz), to sow internal discord and dismay.