Why I left the Republican Party to become a Democrat
The most important thing we have learned this year is that, when the Republican Party was hijacked by a dangerous fascist who threatens to destroy the institutions that make America great and free, most Republicans up and down the organizational chart stood behind him and insisted he ought to be president.
Some did this because they are fools who do not understand why Trump is dangerous.
Some did it because they were naïve enough to believe he could be controlled and manipulated into implementing a normal Republican agenda.
Of course, there were the minority of Republicans who did what was right and withheld their support from Trump: people like Ohio Gov. John Kasich, Nebraska Sen. Ben Sasse, and Hewlett-Packard CEO and megadonor Meg Whitman, the latter of whom called Trump "a threat to the survival of the republic."
http://www.businessinsider.com/why-i-left-republican-party-register-democrat-2016-10