If Trump cared about the success of the American people, he would act as if he was at least trying to be a president for all Americans. Even when he talks as if that's who he is, he often sounds stilted and uncomfortable speaking from the heart. It does not come natural to him, which does indeed say a lot about the man. And some of us have had the eyes to see that clearly, for years.
He would actually have received at least a slight uptick in approval among voters who did not vote for him in 2016 if he actually showed that he cared more about all Americans than he does about Donald Trump. But he hasn't. And he never has. At least half the country would have stayed in their seats. Not out of partisanship, but out of dislike of a miserable human being who enjoys cruelty and it's applications. He certainly puts the bully in the bully pulpit, and like no other in my lifetime.
And
@Zombie is right, the opposition sitting it out is par for the course. A trip down memory lane....
Further, I believe for Trump, and for many of his followers, cruelty has always been the point. Trump hates the people his core supporters hate. This has long been obvious to me, and the fact so many miss this fundamental truth, and actually think it's great to have a bully(and most bullies at heart are cowardly) as a president says something rather ugly about the United States.
https://www.theatlantic.com/ideas/archive/2018/10/the-cruelty-is-the-point/572104/