List of sources quoted in this list of "push back:

• A group called “Republicans against Trump” which seems to just be this twitter account with a buymeacoffee link which posted “Republicans could choose this man to represent them, instead they preferred a corrupt racist buffoon with no morals. The party deserves a humiliating defeat in 2020.” In May 2020, making me suspect they’re not actually Republican or possibly a group at all.
• “A Republican accountability group called American Bridge 21st Century” which is described on Wikipedia as “a liberal American Super PAC that supports Democratic candidates and opposes Republican candidates.”.
• The American Federation of Labor and Congress of Industrial Organizations
• A “popular liberal commentator”
• A Democratic Representative
• The White House political director

So if you were hoping for actual consequences from his base or even just someone new and noteworthy criticizing him, this is not the article for you. I’m glad the Trade Unions are going to spread the word though, that will be a good thing.