Story highlights John Kasich says he's staying in the Republican primary race

That despite Donald Trump's massive delegate lead

Indianapolis (CNN) Ted Cruz is out, but John Kasich isn't going anywhere, his camp said Tuesday night.

In an email to supporters, the Ohio governor's presidential campaign hopped on the news that Cruz was throwing in the towel, meaning Kasich is the sole remaining primary competitor to front-runner Donald Trump.

"Sen. Ted Cruz just dropped out of the presidential race and it's up to us to stop Trump and unify our party in time to defeat Hillary Clinton," Kasich campaign manager Ben Hansen said in the email, which also asked supporters to donate money.

One Kasich adviser referenced a story The governor has told at various points during his lagging campaign. At one point during a governor's race, former California governor, Hollywood star and Kasich supporter Arnold Schwarzenegger advised Kaisch to "love the beatings." That, the adviser said, just how Kasich approaches the race. It's something that has become even more important given the man who is now his lone opponent: Trump.

Cruz suspended his White House bid Tuesday, shortly after his drubbing in the Indiana primary. Republican National Committee Chairman Reince Priebus quickly declared Trump his party's presumptive nominee.

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