And that, my friends, is a perfect storm of chaos: Trump riding high, but not high enough to best the non-Trump vote, while the non-Trump vote remains badly splintered, with no movement at all toward clarifying which single candidate might emerge to challenge him, and the various options training their fire (and tidal waves of negative ads) on each other.

For the past several months, the smartest of the Trump doubters have based their case on Trump’s relatively low ceiling of support. Yes, he’s leading the polls in a very crowded field, but that ceiling (never higher than the mid-30s) is unlikely to go much higher, and certainly not past a majority in any state. As soon as the non-Trump vote falls in behind an establishment candidate, he’ll be beaten.

But what if that doesn’t happen before the GOP primaries become winner-take-all in mid-March? In that case, Trump is going to start piling up an awful lot of delegates, even if his share of the popular vote never rises above 40 percent. That might not be enough to clinch the nomination, but it would be enough to give us the most riveting political convention in a very long time.

Who would emerge from the chaos in Cleveland? Trump? Cruz? Rubio? Bush? Paul Ryan? Mitt Romney? It could be any of them.