I will be caucusing on Feb 1 in Iowa--and for the first time in my life as a Republican (I am previously a life-long registered Democrat, growing up DFL in Minnesota, and going to the Democratic caucuses in Iowa in 1992, 2000, 2004, and 2008). I have not always voted for the Democratic candidate (I voted for Reagan in 1980, for H.W. Bush in 1988, for Dole in 1996, for G.W. Bush in 2000 and 2004, McCain in 2008, and Romney in 2012). Since 1996, I have refused to vote for any candidate who is pro-choice and not supportive of traditional marriage. At this point I intend to caucus for Rubio. If the G.O.P. nominates Trump, for the first time in my life, I will not cast a vote for president. If the G.O.P. "establishment" moves to endorse and support Trump, I will simply not go to the polls--refusing to cast a vote for any candidate. Trump is an opportunist who cannot genuinely account for how he has changed from his pro-choice et al progressive Democrat positions--at least he has not to my knowledge. I think voting for him is as bad as voting for Hillary, Bernie, O'Malley, or Biden.