Maybe he thinks he can attract more voters than the republicans. Seriously, how many people do you know that can’t wait to vote republican? If this is a party that puts Americans first, they could pick up a lot of not insane democrats and independents. There are a lot of those who simply won’t vote republican. I suspect Trump sees something in polling that makes him think this is worth doing.
The key to all of this is to see the makeup of 74 mil