To be honest, it's a surprise for me. Because in order to win, Trump needs to broaden his audience. What's the point of limiting himself to only his supporters on truth? They are his hardcore supporters anyway. It’s like preaching to the choir.
> in order to win, Trump needs to broaden his audience
I don't think this is true. Trump's message, image, and behavior were possibly the most widely/frequently broadcast of any human in history. There is effectively no stone left unturned for him.
There was also some analysis during his presidency that the more he tweeted, the worse his approval rating got. That might not be true these days, but it shows that not all publicity is good publicity.
> What's the point of limiting himself to only his supporters on truth?
He can squeeze them for donations, just as he does with his email campaigns.
In the last election, he got more votes than anybody had in history. He lost only because he opponent got even more than that.
Much has changed since then. His opponent came with a relatively clean track record, at a time when he himself was seen to be struggling with a crisis. The opponent now has several crises of his own to deal with, most notably inflation, an issue that strikes close to home for a lot of voters.
So broadening his base may not be necessary. His base is quite enthusiastic, and it may suffice merely to demoralize his opponents. That strategy had worked for him in his first election, and now can come with the advantage of spending two years harassing the incumbent.
There are always too many variables to predict confidently, but his wisest course of action may simply be to do exactly what he's always done and hope that circumstances break his way -- which they very well could.