With just 44 percent of the vote in Ohio on Tuesday night, genial John Kasich may have roadblocked Donald Trump's path to an uncontested Republican nomination. Now, the Republican frontrunner might not get the 1,237 delegates he needs before July's GOP convention in Cleveland.

Those numbers are tough. But even tougher, for Trump: identifying and seating the actual delegates themselves. And Trump, by disrespecting the state Republican parties in the states he's won, smacked a huge target onto the backs of those valet-chosen silk suits he wears.

Trump has been inattentive to the mechanics of voter identification and field persuasion. His brand of politics has allowed him to run roughshod over his opponents by sheer force of personality. He has spit in the face of the national party and has publicly cast aspersions on state parties, too, accusing them of stacking debate audiences with donors to favor his opponents. This plays well with his angry electorate, but it comes with a huge price: In order to make sure that his delegates remain loyal, he needs the state parties to cooperate with him.

"I warned them," a state GOP chairman messaged me last night. "It may be too late."

Instead of calling all 168 members of the Republican National Committee last year or forging at least quiet alliances with state chairs, Trump's "campaign continually harassed and cajoled dozens of state chairs into staying silent, holding the loss of business relationships or donors over their heads," the chair said.

Two other GOP chairs confirmed this assessment in separate messages to me last night.

For weeks now, Republican operatives who oppose Trump have begun an effort to identify the men and women in each state who will likely be slated as Trump's delegates to the nomination. Sen. Ted Cruz's campaign has its own state-by-state delegate identification and selection effort. So far, state chairs say they've heard next to nothing from Trump's campaign.

This matters in states as small as North Dakota and as large as Michigan.

Last Tuesday, Trump won 36.5 percent of the vote in Michigan, earning himself 25 delegates at the national convention. But the identity of those delegates is key. And they're not yet known, because Michigan selects its national convention delegates at a state caucus on April 8 from a pool of at least several hundred Michigan Republicans.

Though those delegates will be bound by national and state rules to support Trump through the first ballot at the convention, their identities might be the difference between a first ballot win and a complete loss — the election of someone else.

It's entirely plausible that a state could seat delegates pledged to support Donald Trump who have open affiliations with other candidates. The attendees at these state caucuses and conventions can elect whomever they want. This happens all the time. In 2012, according to a great explainer by Frontloader, folks who disliked Mitt Romney not only messed with the number of pledged delegates he was to seat, but they also worked to install their own partisans as his delegates. They did this not to mess him up at the convention — his victory might have been a foregone conclusion. But conventions are big, fun parties. Paid, expensive parties. You can understand why rival factions within a state party would want to reward as many members of their own tribe as possible.

The RNC's rules committee has tried to address this by tightening the rules governing the allocation of pledged delegates: The proportion of pledged delegates actually sent to the convention must align with the proportion actually won by a candidate in states that don't give their winners all of their delegates.

But states still get a lot of latitude. That's why smart (and devious) Republican operatives are secretly working to influence the delegate selection process. They want as many of their own supporters as possible to identify as pledged Trump delegates. That way, those men and women will fall to their (real) default choice if Trump doesn't win a majority of delegates on the first ballot.

Sabotage is not out of the question either. What happens if a pledged delegate decides not to show up for the first ballot? He or she might lose their status — but Trump doesn't automatically get that vote.

Manipulating the delegate selection process won't be enough to propel Ted Cruz or John Kasich to the nomination by itself. But a few persuadable delegates in the right states at the right moment could tip the ballot in their favor down the line.