Basically he has seen that miners were getting a bit of pushback, and now he wants to make sure that he could get all their votes, its simple politics. If the %30 extra added tax thing (due to super high energy consumption that is) that would mean that Miners will of course not like that, and if Trump comes up and says "I am going to help you a lot, instead of hurt you" then he believes they will vote for him, and god knows maybe some will. But do not think for just a moment that he actually cares, nor he will do, because he had a lot of promises and he bailed out on them. Either politician isn't good ,bitcoin was created so we do not listen to them.