There were DEMOCRAT PACs running ads to support him because he would have faced a Roy Moore-like general election.
President Trumps refusal to endorse a committed nationalist like Kobach was very telling. HE HATES TO ENDORSE LOSERS.
Sometimes, really good people, are just not good at getting elected, for whatever reasons.
Dan Bongino is another of those people. He ran for office at least twice, but lost. C’est la vie (& ‘harvested votes!’)