Re Perry's note that Trump's endorsement maybe isn't helping Kobach that much in the GOP primary for governor in Kansas: I can think of a couple explanations for that.
First, in other races, Republican primary voters might not have known the candidates too well. In that case, Trump's endorsement just gave them the information they needed to vote: "Oh, I don't know much about this guy, except I know Trump endorsed him, so let's go with him." In Kansas, everyone knows Kris Kobach, and they've already made up their minds about him.
But second, maybe it DID make a difference. Maybe Kobach was trailing by a decent amount before that endorsement came through, and it threw him a life preserver.