Mitt Romney has entered the next phase of his stop Trump crusade and will campaign with Ohio governor John Kasich in the state Monday.

NBC News reported:

Mitt Romney to Campaign with John Kasich in Ohio

Mitt Romney will campaign with John Kasich Monday at two stops in Ohio, NBC News has learned from a source familiar with the plans.

Romney is not expected to endorse the Ohio governor during the campaign swing, the source said, but it will be the first time Romney has campaigned on behalf of a Republican candidate this cycle.

It’s a significant move for the former Republican nominee, who previously recorded campaign telephone “robocalls” for Kasich as well as Marco Rubio.

Earlier this month, at a speech in Utah, Romney lambasted frontrunner Donald Trump as a “fraud” and warned of the dangers to the Republican Party if Trump were the nominee.

“I believe with all my heart and soul that we face another time for choosing,” said Romney at the time, “one that will have profound consequences for the Republican party and more importantly, for the country.”

Here’s a robocall Romney ran for Kasich in Michigan:

Boston.com provides some insight into Romney’s thinking:

Mitt Romney explains why he waited until now to attack Donald Trump

Mitt Romney says he wanted to speak out months ago about the “threat” Donald Trump presents to Republicans and to the country as a whole. The former Massachusetts governor told The Boston Globe he found it “astonishing” that none of the other Republican candidates would aggressively attack Trump.

But, according to a transcript of the Globe’s wide-ranging interview, Romney said his close advisors begged him not to get into it with Trump.

“‘The return fire is going to be overwhelming,’” Romney said he was told. “‘It will hurt you, and it will accomplish very little. Don’t do it.’ I literally had one of my advisers say, ‘I’m begging you not to do that.’”

Count me among those who are wondering where this Mitt Romney was in 2012.

Featured image via YouTube.