Most Americans don’t want a border wall, and only 25 percent of voters want him to deport illegal immigrants. They don’t support ending Obamacare or free trade.

So what do we do now?

First, we must try to help Trump succeed. I urge Republicans of conscience to join his administration, to temper his worst instincts. Six years ago, the top Republican in the Senate said his top political goal should be defeating President Obama. I hope Democrats don’t act that way. If Trump drops the crazy talk of the campaign, he could easily find compromises on the economy and immigration. Trump reinvented himself for this campaign. He’s capable of remaking himself again into a practical leader.

But if he doesn’t, if he governs as recklessly and as divisively as he campaigned, there will be checks on his power. Stock markets will crash and a recession will come if he gets us into trade wars. If he doesn’t change his views about foreign policy, he’ll get no support from allies.

If he uses the federal government to prosecute and jail his critics — well, then we would have a crisis. If he starts rounding up Muslims or inflames the anti-Semitism he stirred up in the campaign, I and many others — including many Republicans — will fight him with everything we have.