It would deplatform him and that's the best way to kill the movement for anyone but the most radical.

We can see that in Canada with the far right party that medias had the legal obligation to cover during the last campaign (because of high enough vote intentions based on surveys), after the campaign (and after not winning a single seat) their social medias lost 80% of its audience based on the number of likes and shares. The followers just stopped caring because they weren't all over the news anymore.

Get Trump off the news and off social media and his chance of winning the primary will become zero.