It seems to me that there are different ways of supporting Trump. One kind of supporter is the real MAGA supporter who really thinks that talking about grabbing the you-know-what was just locker room talk, who thinks that all the self-absorbed twitter posts have a deep and valuable purpose, who think that children in cages was just law and order, who think that his relationship with the Russians wasn't just not a conspiracy, it was wrong to even start counterintelligence investigations into it, who thinks that not only wasn't the call to Zelensky not sufficient grounds for removal from the Presidency, it was a perfect call, who think that Trump's leadership with respect to COVID-19 is really good, (and the virus is all China's fault), who think that when he tweeted about shooting looters he was just affirming our Second Amendment rights. This is the Orange Man Great perspective.
I think this viewpoint is delusional, in much the sense that Dawkins wrongly thinks that belief in God is delusional.
But other people think that even though Trump isn't the Best of All Possible Leaders, he is preferable to anything the Democrats have to offer. This might be due to his anti-abortion activity, or because of his court appointments, or because of his tax cuts, his deregulation policies, etc., he is preferable to the alternative. In addition, he, unlike McCain and Romney, actually won his election, being better at appealing at the emotional level to people than his Republican predecessors. Still, he has plenty of failings, but they will support him and vote for him anyway, holding their nose with respect to some things.
The prevailing defense against the impeachment case was that, yeah, Trump did something wrong in his dealing with the Ukrainians, but it wasn't sufficient for the drastic step of removing the President from office. But the Trump campaign is doing its best to try to get everyone to forget that.
But those in the second category have to be concerned that Trump will continue to make foolish comments and actions that will throw away the November election, if it has not been thrown away already. Showing as much compassion for COVID victims as George W. Bush would have shown might have been sufficient to given him an edge over Biden, but that is not the leader that we have. Making foolish comments about opening up a cold case against a television commentator for murder is another unforced error. The lead the Biden has over Trump in the polls, both nationally and in the battleground states, is the result of Trump's mistakes. He was taken of Twitter by his campaign in the waning days of the 2016 campaign (the most brilliant move in the history of Presidential campaigns). The only hope he has of re-election is if the campaign makes the same decision for him NOW. But there is no way they can insist on that at this point, now that he is a sitting President.