They need to delegitimize him. When he distills a situation to its essence and determines the necessary end result, and then he acts according to the best interests of his constituency and his country. You're concerned about losing your job; I'll promise Carrier preferential tax treatment so you can keep your job. I'll make up the difference later by maybe not sending billions of dollars to people who want to kill us.
Why don't we simply keep track of his accomplishments and enumerate them every time his detractors attempt to discredit him?