Impeach him for what? Actually doing what he promised to do so far?
Promise as you may, but once you are POTUS, you have to follow the rules for the chief of the Executive Branch. Thoroughly reading intelligence reports, no matter the length, and then coming to a decision opposing the CIA & FBI and cabinet members and generals is one thing. Refusing to read those reports and instead just "off the cuff" making terribly important and terribly wrong/ consequential decisions is another thing. For instance, his non-briefed unilateral decisions to interact with allied leaders and insult them over the phone or in person is HARMFUL TO THE ENTIRE COUNTRY. Had he taken advice or even bothered to be briefed by the other parts of the executive branch, he never would have done what he did.
He is a spoiled child sitting on a throne. King Trump. Flick him off. Now.