Most voters focus their attention on candidates they believe have a reasonable chance of becoming president. They want to think that their vote counts.
If that turns out to be the case, by November, things could be looking quite different. If current trends continue, Democrats could take control.
At this stage, it's a little late. He doesn't have endorsements or the funding available to him to prevail against a sitting incumbent.
At this stage as we look forward, I wouldn't say nothing is resolved. But it's not nearly as clear as some people would like it to be.