Intelligence Committee Report

The House Intelligence Committee has issued a report stating that "the call record alone is stark evidence of misconduct; a demonstration of the President’s prioritization of his personal political benefit over the national interest".

The report details how the withholding of aid became public and "the president’s scheme unraveled". Public statements form part of the evidence.

On October 17, at a press briefing in the White House, Acting Chief of Staff Mick Mulvaney confirmed that [von Clownstick] withheld the essential military aid for Ukraine as leverage to pressure Ukraine to investigate the conspiracy theory that Ukraine had interfered in the 2016 U.S. election.

Perhaps this excerpt gives the best summary:

The President engaged in this course of conduct for the benefit of his own presidential reelection, to harm the election prospects of a political rival, and to influence our nation’s upcoming presidential election to his advantage. In doing so, the President placed his own personal and political interests above the national interests of the United States, sought to undermine the integrity of the U.S. presidential election process, and endangered U.S. national security.

Update (December 7):  Rachel Maddow points out that the section headings of the Intelligence Committee Report basically summarizes the entire story.

And in a letter to Congress, more than 500 legal experts conclude Fuckface von Clownstick "engaged in impeachable conduct".

[T]here is overwhelming evidence [he] betrayed his oath of office by seeking to use presidential power to pressure a foreign government to help him distort an American election, for his personal and political benefit, at the direct expense of national security interests as determined by Congress.