Kasich beats Trump in Ohio

John Kasich, New Hampshire, Primary
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Republican presidential candidate John Kasich is projected to win the Ohio primary, knocking off rival Donald TrumpDonald TrumpTrump claims he was endorsed 'conceptually' by military McMullin scraps Virginia event to focus on Western states Climate’s on the ballot like never before MORE to secure a critical victory that increases the likelihood of a contested convention.

Kasich's win gives him all 66 of the state's GOP delegates.

Fox News and CNN called the race at about 8:45 p.m. EDT, just over an hour after polls closed.

The Ohio governor was fighting for his political life. He had said that he would end his campaign if he lost on his home turf Tuesday.

Kasich got a late assist on the trail from 2012 GOP presidential nominee Mitt Romney, who campaigned at his side.

And rival Marco RubioMarco RubioBreitbart, liberal activist cooperated on GOP primary disruptions: report Obama seeks down-ballot gains after being midterm loser Chamber endorses bill to block proposed estate tax rules MORE, who had practically no chance iof taking n Ohio, had told supporters in the state to vote for Kasich to try to keep the state's delegates out of Trump's hands.

Trump's loss makes it tougher for the businessman to clinch the nomination outright before the GOP convention. He gains no delegates from Ohio because of the winner-take-all rules.