John Kasich is projected to win Ohio

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Gov. John Kasich Tops Donald Trump in Ohio Primary

Republican presidential candidate Ohio Gov. John Kasich apparently just scored a key victory in his home state.

CNN reported on Tuesday evening that Kasich would clinch the Ohio Republican primary, scooping up all of the state's 66 delegates and marking the governor's first primary win of the election.

SEE ALSO: 2016 presidential election polls

The state was a must-win for Kasich, who is openly vying to win the nomination in a contested convention, and said he would drop out if he did not win his home state.

Kasich's victory also makes Trump's path to securing the 1,237 delegates needed to claim the nomination somewhat more difficult.

RELATED: Kasich on the campaign trail

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John Kasich on the campaign trail
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John Kasich is projected to win Ohio
MILFORD, NH - SEPTEMBER 7: Republican presidential candidate John Kasich greets supporters at the Labor Day parade on September 7, 2015 in Milford, New Hampshire. Kasich, buoyed by what observers called a strong performance in the first GOP debate, has emerged as a first tier presidential candidate with voters in New Hampshire, the nation's first primary state. (Photo by Kayana Szymczak/Getty Images)
Republican presidential candidate Gov. John Kasich, R-Ohio, waves as he arrives for a campaign stop at Robie's Country Store Wednesday, Sept. 2, 2015, in Hooksett,N.H. The nation's first presidential primary in New Hampshire is less than six months away.(AP Photo/Jim Cole)
Republican presidential candidate Gov. John Kasich, R-Ohio, speaks during a campaign stop at New England College Wednesday, Sept. 2, 2015, in Henniker, N.H. The nation's earliest presidential primary in new Hampshire is less then six months away. (AP Photo/Jim Cole)
Republican presidential candidate, Ohio Gov. John Kasich talks with a fairgoer during a visit to the Iowa State Fair, Tuesday, Aug. 18, 2015, in Des Moines, Iowa. (AP Photo/Charlie Neibergall)
Republican presidential candidate, Ohio Gov. John Kasich, shakes hands after speaking to a packed crowd during a campaign stop at the VFW Wednesday, Aug. 12, 2015, in Derry, N.H. (AP Photo/Jim Cole)
Republican presidential candidate Ohio Gov. John Kasich speaks to members of the media in the spin room following the first Republican presidential debate at the Quicken Loans Arena, Thursday, Aug. 6, 2015, in Cleveland. (AP Photo/Andrew Harnik)
Republican presidential candidate Ohio Gov. John Kasich speaks during the first Republican presidential debate at the Quicken Loans Arena Thursday, Aug. 6, 2015, in Cleveland. (AP Photo/Andrew Harnik)
Republican presidential candidate, Ohio Gov. John Kasich, center, greets members of the media at Quicken Loans Arena in Cleveland, Thursday, Aug. 6, 2015, before tonight's first Republican presidential debate. (AP Photo/Andrew Harnik)
Republican presidential candidate Ohio Gov. John Kasich speaks during a town hall meeting, Friday, July 24, 2015, in Des Moines, Iowa. (AP Photo/Charlie Neibergall)
Republican presidential candidate Gov. John Kasich arrives for a town hall style meeting Tuesday, July 21, 2015, in Nashua, N.H. after announcing his plans earlier in the day to seek the Republican nomination for president. (AP Photo/Jim Cole)
Ohio Gov. John Kasich announces he is running for the 2016 Republican party’s nomination for president during a campaign rally at Ohio State University, Tuesday, July 21, 2015, in Columbus, Ohio. Kasich, a two-term governor and former congressman, has little name recognition in the crowded GOP field, but he is already airing television ads in New Hampshire where he is heading immediately after making his run official. (AP Photo/John Minchillo)
Ohio Gov. John Kasich pauses before he announces his run for the 2016 Republican party’s nomination for president during a campaign rally at Ohio State University, Tuesday, July 21, 2015, in Columbus, Ohio. Kasich, 63, launched his campaign before a crowd of 2,000 at an event marking the entry of a strong-willed and sometimes abrasive governor in a nomination race now with 16 notable Republicans. (AP Photo/John Minchillo)
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In the days leading up the primary, polls showed Kasich running neck and neck with Trump in the Buckeye State. Trump campaigned hard in the state in the final days, canceling a Florida campaign event Monday night and scheduling a rally in Ohio in its place.

After months of largely ignoring the governor, Trump also escalated his attacks on Kasich,hammering him for supporting the North Atlantic Free Trade Agreement and taking a more measured stance on immigration reform.

"Ohio is losing jobs to Mexico, now losing Ford (and many others). Kasich is weak on illegal immigration. We need strong borders now!" Trump wrote in a Tuesday tweet.

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