nah he'd have lost even worse if he did that. His supporters hate the masks. Unlike liberals they're not sheep and won't support uncomfortable masks just because of trump. Trump was already hemorrhaging supporters because of his betrayals after taking office. Not building the wall and not repealing obamacare. Which is why he lost to Biden, a terrible candidate, any dem would have won. But supporting masks would have made it even worse and also cost other repubs elections downticket.