There several several reasons Trump lost Wisconsin and Cruz being the better candidate was not one of them.
Trump had a very bad two weeks up to that primary with the Corey Lewandowski problem, the Abortion question from Chris Matthews, you name it. It was Trump’s big stumble in the campaign. Now of none of those things had happened he probably would have beat Cruz. He didn’t and he recovered and has won the nomination.
Ryan may very well a problem in his district and as has been pointed out he has lost his own hometown twice in the since 2012. He has a very tough primary fight.
Cruz had nothing to do with Trump losing WI.... Not sure why you are implying I said it did.
Trump lost WI because the GOPe and State machine there are well oiled and battle tested and they were mobilized to the anti trump/never trump side of things... Trump had no shot in Wi once the machine was mobilized.
if the GOPe had machinery like they have in WI in all 50 states, Trump would have never gotten out of the gate, and Republicans would never win a national election.
I doubt Ryan is at any risk in WI to a republican primary challenge, and frankly the harder outside forces try to influence WI the harder they fight back. If you haven’t learned that through the Walker years, I think you are quite naive.