Kasich would defeat Clinton by 16 points in Pennsylvania if the election were held today. Other polls have shown he would defeat her in Ohio by 17 points, by 14 points in Wisconsin, and 6 points in Michigan.
RealClearPolitics - 2016 Latest Polls
Yet Republicans want to continue backing Trump who would lose all of these states badly
Yes, and let them, but after yesterday loss I believe some Trump voters are realizing that Trump might not be the candidate.
He carries 1/3 rd of the Republican Party and last night vote showed he did not budge much from that fact and carrying only 1/3rd of the GOP is not going to win him the National Election.
Trump speeches against Women, and Minorities ( Hispanics and Muslims are minorities in this nation ) will cause them to either vote for the Democratic Nominee, go third party, or just stay home, but they will not vote for him.
Now I am sure his typical voter believe those voters do not matter, but they do and it will give Hillary Clinton a landslide victory or even Bernie Sanders...