You need to educate the >30% that still support Trump and his party.
You need to educate people generally. There is no quick fix for what ails the United States. It will take decades and probably generations.
You need to restore the rule of law and compassion for your fellows. Not fascist brutality, but just laws applied to all with reasonable force and consequences. And it has to apply to presidents and billionaires as much as to homeless people.
You need to do something about the grotesque and harmful disparity of wealth. Not just the occasional, sensational murder. Real structural change and stop venerating the greedy sociopaths. There has never been a 'free' economy. Capitalism exists only to the extent that governments support it. Unregulated, it is harmful. You need to reign it in. Not eliminate it, there is much that is good about it. But currently, it has run amok and is obviously dysfunctional.
You need healthcare, shelter and food security for everyone. That the wealthiest society in the history of humanity has homeless people dying on the streets without healthcare is a travesty.