Even most of Trump’s ardent supporters seem to often say there are things they disagree with him on. So the chinks in the armor there. If the GOPe trains fire on those vulnerabilities, there is a chance they could take him down.
But taking down Trump doesn’t mean Jeb goes up in the polls, as Trump himself wisely pointed out this week. Ben Carson might go to the top. Or Ted Cruz. And then we’re back in the Romney situation, where he had to keep putting out negative ads on every new competitor that cropped up. We can assume that every negative about every competitor will come out. So it may be a survival of the fittest. I would guess that Ted Cruz would be the most likely to survive a negative blitz, because he doesn’t have many weak points. All they could hit him on is the government shutdown, which won’t hurt him with conservatives at all. They can’t hit him on inexperience like they can Carson.
What is interesting about Trump is that he is pulling in Independents, Democrats and Conservatives so they are stymied as to how to take him down. They tried to shake the conservatives by painting him as unreligious, anti-military, and lacking the temperament to be president. They tried to shake the others by making him look sexist. Whatever they do, they wish to be stealth about it and they hope it works. The reason nothing has worked so far is because those GOPe who are against him are viewed as traitors, liars, corrupt, dangerous to the country, and as sellouts. The country lost faith, hope and trust in them and now they are ineffective in their schemes.