Obviously, Donald Trump won't be impeached or removed so long as the Republicans hold even one House of Congress. And even should they lose both in November of 2018, launching an impeachment - as the Republicans discovered with Bill Clinton - is very dangerous to the impeaching party. Unless you have a highly credible set of extremely damning facts, you turn a constitutional crisis into a political crisis. You rally potential supporters of the impeached president to him. You make his base bigger. So I imagine that he is likely to serve out the full term.
David FrumThe thing that sustains a strong Fox network is the thing that undermines a strong Republican party.
David FrumDonald Trump is the least unpopular thing about today's Republican Party. I mean, the idea that a Mitch McConnell or a Paul Ryan could say, "Let's toss Trump overboard and return to our program of plutocratic politics, health care removal, massive income tax cuts for the affluent, deregulation of finance" - if they cut loose from Donald Trump, it's like, you know, storm in channel, continent cut off. If they cut loose from him, they are much likelier to sink.
David FrumThe business model of the conservative media is built on two elements: provoking the audience into a fever of indignation (to keep them watching) and fomenting mistrust of all other information sources (so that they never change the channel).
David Frum