Sean Hannity often says that on his radio show and the scary thing is, he's right. I know there are many Republicans, conservatives, and independents who will not vote for Trump for a variety of what they claim are very solid reasons. Neither will they vote for Hillary. The main argument of the "Never-Trumpers" seems to be that Trump is just not acceptable as a candidate, both in terms of policy and temperament, and that it would be best if we just let Hillary win. Many of them also assume that after President Clinton screws up the country for four years, the Republicans will then retake the White House in 2020 and everything will be honky-dory. It sounds like a reasonable plan, but it is not.
The problem with that line of thinking is that Hillary will not be dislodged in four years, nor do I think, assuming Hillary wins in November, a Republican will win the White House in eight years, or perhaps ever again. I don't think people understand how vicious and calculating Hillary Clinton is and how she will use her first term to lock in various policies and election fraud techniques that will make it nearly impossible for a Republican to ever win the White House again. A Hillary presidency means the Democrat Party will remain in power for generations and will preside over a great decline in American economic and military strength. It is also likely the GOP will cease to exist as a viable party and will slowly dwindle to irrelevancy. Perhaps other small parties will emerge, but none will be able to challenge the Democrat Party dominance.