Donald Trump must be impeached and removed from office. Not because his policy is bad, though that is very true, but because he is so erratic and unstable as to be a threat to all life on Earth. And it will be up to Congressional Republicans to do it.

They are the only ones with the power to impeach Trump at this point (which requires a majority vote in the House to impeach and a two-thirds vote in the Senate to convict and remove from office). The reason they should is not to advance liberal political goals — if anything Vice President Mike Pence would be a more effective policymaker and a more formidable candidate in 2020 — but because of Trump’s actual danger to American society.

Let’s roll the tape.