The best way for Trump to deal with this, in my opinion, is to use his bully pulpit in a way not expected of him - to be calmer and more measured than those who are trying to sink him. I think he would be well-served to have a chat with the American people to say something along the lines of:
‘I am doing my best to fulfill what I've promised you. It's a very dysfunctional environment here in Washington, and this is unfortunate for you and your families. I promise to you here again that I will continue to fight for you for as long as I am honored with the privilege of doing so. We are making progress, and we will succeed. I also want to tell the American people, unequivocally, that my unwavering commitment and allegiance is to the United States of America, the country I love and would give my life for. I have never, and would not ever collude with any foreign power. It's not something I would ever consider, and is against every fiber of who I am as a person and an American citizen.
I ran for this office not because I thought it would enrich me - as it has some others before me, but because I truly believed that we were becoming lost as a nation - and too divided. Let's move forward together and fix the problems that prevent us from being the best that we can be. I also ask, that instead of focusing on the faults in our great nation, that we treasure what is great about it, and work together to make it better - in order to form a more perfect union’.
He needs to diffuse the toxicity, and rise above the pettiness around him.
He was so awesome in West Virginia tonight, I had tears in my old eyes. What a leader sent by God.