Then how did he win the primary? He was the prefered choice of the majority of republicans.
I disagree. Trump was the preferred choice in the first few primaries, where there were actually several people running. But people started withdrawing after just the first couple of primaries, and in many states they weren't even on the ballot.
The first primary was mid January, with 6 people on the ballot. The AZ primary was two months later... and while all 6 of those people were still *listed* on the ballot... all but two had already withdrawn from the race. They started dropping out within the first couple of weeks.
So all of the later primaries end up with a choice between just Trump and Haley, or in some cases just Trump because everyone else had already announced that they were no longer running.
Trump ends up the nominee by default, and around 90% of the country never got to voice their opinion on it.
For the Republicans, Iowa alone got to make the first decision, and three contenders dropped out after a *single* primary in a *single* state. Only 4 other states got a shot at Binkley, and less than half of the states had Haley as an option. For over half of the states, the ONLY option available was Trump, regardless of whether the citizens in those states wanted them or not.
The Democratic primaries weren't much better - there were fewer contenders to begin with, and really only two other than Biden on the early ballots. By mid March, everyone had withdrawn except Biden, and many states didn't have any other options available. At least Williamson and Palmer have stuck it out longer than the other potential Republicans did.
Despite every other Republican having dropped out by March, Trump only had about 75% of the vote at the end of April. At that same time point, Biden had 86% support.
I find the process infuriating. I think that all primaries should be open, and I think they should all happen on the same day, or at least within the same week. As it stands, we end up with the decision on who gets to run being made by a minority of people in a minority of states, and most of the rest of the country just gets screwed over.