From the National Review:
While conservatives fought against the auto bailouts, Donald Trump claimed the government should stand behind [the auto companies] 100 percent because they make wonderful products.
While conservatives fought against the bank bailouts, Donald Trump called them something that has to get done. Let his reasoning sink in for a second: The government can take over companies, and, frankly, take big chunks of companies.
When conservatives desperately needed allies in the fight against big government, Donald Trump didnt stand on the sidelines. He consistently advocated that your money be spent, that your government grow, and that your Constitution be ignored. Sure, Trumps potential primary victory would provide Hillary Clinton with the easiest imaginable path to the White House.
But its far worse than that. If Donald Trump wins the Republican nomination, there will once again be no opposition to an ever-expanding government.
Put aside for a moment Trumps countless past departures from conservative principle on defense, racial quotas, abortion, taxes, single-payer health care, and immigration. (Thats right: In 2012, he derided Mitt Romney for being too aggressive on the question, and hes made extensive use of illegal-immigrant labor in his serially bankrupt businesses.) The man has demonstrated an emotional immaturity bordering on personality disorder, and it ought to disqualify him from being a mayor, to say nothing of a commander-in-chief. Trump has made a career out of egotism, while conservatism implies a certain modesty about government. The two cannot mix.
Read more at: http://www.nationalreview.com/article/430126/donald-trump-conservatives-oppose-nomination