I think she would win a ton of respect if she endorsed Kasich right now. If she said something like:
You know, I disagree with Governor Kasich on a lot of issues, but he is a very decent man, and I know that if I had to face him in the general election it would be very tough for me, much tougher than Donald Trump. But that doesn't matter. The honor of the Republican Party, one of our great political parties, is at stake, and that's more important. Having Donald Trump as the GOP nominee is a threat to our national security because of the image we send to the world. Therefore, I ask all responsible Republicans, vote for John Kasich.