middle-of-the-roader

He added that Udall, a middle-of-the-roader who works well with Republicans in the Senate, “was captured by consultants.”

George W. Bush did not suddenly end up looking like a middle-of-the-roader because Norm Mineta vouched for him.

If he knew that you are a middle-of-the-roader, he would praise Communists, you know.

I don't think you can call a man an extreme leftist, rightist, or middle-of-the-roader and have him classified that simply.