Who are Trump’s real GOP challengers?

Haley could sell well to GOP voters looking for the next Reagan or Bush, says the writer. — The State/TNS

POLITICAL chatter these days pretty much turns on the same sorts of questions: is Donald Trump likely to win the GOP (Grand Old Party, as Republican Party is also referred to) nomination? Will Joe Biden be the Democrat nominee? If Trump wins the nomination, can he beat Biden?

Those are all varying degrees of “yes.” The more interesting question: How much of a chance do Trump’s primary challengers have of beating him? The answer is obviously different for each challenger. But it seems that the field is currently separated into a couple of tiers: a small group that has a chance to beat Trump, a larger tier that doesn’t, and one candidate that doesn’t fit neatly into any box.