House Democrats have laid out their most comprehensive case yet for impeaching Donald Trump, declaring the president "a clear and present danger" over his rush to get foreign governments to investigate a political rival and making his intimidation of witnesses tantamount to a crime.

The report by the House Intelligence Committee on the Democrats' investigation concluded that Trump abused his power, compromised national security and then tried to cover it up — findings that make a formal House impeachment vote all but certain.

"The evidence of the president's misconduct is overwhelming, and so too is the evidence of his obstruction of Congress," the report said. "Indeed, it would be hard to imagine a stronger or more complete case of obstruction than that demonstrated by the president since the inquiry began."