"I will break ranks with my party," the state auditor said in a Facebook post.

While some Republicans - like Sen. Rob Portman - have said they will support Donald Trump should he become the GOP presidential nominee, state Auditor Dave Yost is saying no way.

"I've voted Republican all my life. But if Donald Trump wins the nomination of the Republican Party, I will break ranks with my party and will not support him," Yost said in a Facebook posting. "I cannot support a man who will change any belief and associate with any evil in order to gain power, or who will use the power of government to silence his critics, or who is dismissive of people he doesn't like. Everybody counts, or nobody counts."

When asked this weekend on CNN if he would support Trump if he becomes the nominee, Ohio Gov. John Kasich, who also is running, said, "You know, we're down to now five people. We're all in the arena, and I will show respect to the person that emerges from that arena. I believe it will be me, but at the end of the day, I'm going to support that person who went through the arena and became the nominee."

Yost has campaigned for Kasich and is co-chair of his campaign here in Ohio.

Read Yost's full post below:

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I've voted Republican all my life. But if Donald Trump wins the nomination of the Republican Party, I will break ranks with my party and will not support him.

Unlike some in my party who tell each other that they don't know anyone who is voting for Mr. Trump, I know many. They are my friends, and they have legitimate grievances -- from failed immigration policy to economic policies that benefit Wall Street while Main Street boards up its windows.

In spite of his powerful, legitimate criticisms, Mr. Trump's candidacy is about only one principle: power. He has changed his positions on abortion, Syrian refugees, the flat tax, Afghanistan and more in his pursuit of power.

He wants that for himself, though he says he will use it on our behalf. But in the decades he has possessed power by virtue of his wealth, he has wielded it for himself.

Every political candidate has flaws, because they are human. Mr. Trump is not merely flawed -- his thirst for power at any cost makes him unfit for public trust. What would he not do with public power?

The Republican Party is about freedom -- a free people who can worship and speak and live without interference from the government. It's about free markets where anyone with hard work and a vision can make their own way.

I cannot support a man who will change any belief and associate with any evil in order to gain power, or who will use the power of government to silence his critics, or who is dismissive of people he doesn't like. Everybody counts, or nobody counts.

Nor can I support a man who steals the clothing of Christianity but claims to have never had a need to repent of anything.

This stand will be personally costly. If Mr. Trump becomes the GOP nominee, I won't be welcome in Cleveland this summer when my party holds its convention. If he wins the Presidency, he will be certain to use his power to punish those he views as his enemies.

But a wise man once asked, "What does it profit a man, if he gains the whole world, but loses his soul?"

But we are not doomed to a Trump candidacy. More than 90 percent of the delegates remain to be chosen. I am speaking now in hopes of sparking more thought -- and making my stand with Lincoln, that America will again heed the angels of our better nature, and choose for the good.