They know he won and they hope impeaching would make him ineligible to be restored to the White House as their election fraud scheme becomes more and more undeniable.
They're upset he was showing us reality:
"Why did they trade with an authoritarian regime and by sending millions of American manufacturing jobs off to China thereby impoverish working Americans? Because it made them rich. They salved their consciences by telling themselves they had no choice but to deal with China: It was big, productive, and efficient and its rise was inevitable. And besides, the American workers hurt by the deal deserved to be punished—who could defend a class of reactionary and racist ideological naysayers standing in the way of what was best for progress?"
They're upset he was showing us reality: "Why did they trade with an authoritarian regime and by sending millions of American manufacturing jobs off to China thereby impoverish working Americans? Because it made them rich. They salved their consciences by telling themselves they had no choice but to deal with China: It was big, productive, and efficient and its rise was inevitable. And besides, the American workers hurt by the deal deserved to be punished—who could defend a class of reactionary and racist ideological naysayers standing in the way of what was best for progress?"
(source: https://www.tabletmag.com/sections/news/articles/the-thirty-tyrants)