By winning the South Carolina primary, Donald Trump demonstrated he can win anywhere.

By coming in second place, well behind Trump and barely (about 1,000 votes with 99 percent reporting) ahead of Ted Cruz, Marco Rubio demonstrated he will have a hard time winning anywhere.

Rubio, and basically the entire Republican Party establishment, marched into South Carolina determined to play up an expected third-place finish as a kind of triumph and a second-place finish as outright victory. Before any networks had called second place, Rubio delivered an exultant speech promising to win the GOP nomination.

There are reasons to credit this as more than just amusingly strained political vaudeville. By breaking out of the pack of also-rans, Rubio forced Jeb Bush out of the race. If he hoovers up nearly all of Bush’s supporters, he stands to eclipse Cruz as the de facto leader of the GOP’s non-Trump faction. If John Kasich follows suit, after finishing below even Bush in South Carolina, Cruz may slip to a distant third. Viewed in that light, Rubio’s performance in South Carolina might genuinely and enduringly change the race.

But this also is the most charitable way to interpret Rubio’s distant second-place finish. Not because these are outlandish assumptions—they aren’t. It’s just that even if everything goes according to plan, Rubio will have proved fairly little in South Carolina.