It’s much harder now because he’s been effectively banned from every relevant “public square”.
That is a fascinating nationalization of private space that did not exist 15 years ago. Was every politician prior to Twitter's ascendance effectively banned from communicating with the public?
Even Fox has stopped running his events: https://deadline.com/2021/06/donald-trump-rally-networks-ski...
The largest pro-Trump network has seen major declines in ratings: https://www.thewrap.com/newsmax-fox-news-six-months-ratings/