“If Mitt runs for re-election in 2024, Trump needs to endorse a third party opponent. What’s good for the goose...”
If Mitt still has presidential ambitions he needs to run in 2020 due to his advancing age (he will be 73 in 2020 and 74 in the first year of the next presidential term). If Trump is impeached, or resigns under threat of impeachment, Romney would likely be the GOP establishment choice over Pence.
Watch Romney. He may be maneuvering for the big prize. The press will support him, like they did McCain, until he wins the nomination. Then they will engage in nuclear warfare to destroy him. If Trump is impeached, and Romney is the nominee, the GOP base will stay home on Election Day, giving the Dems an electoral vote landslide and control of both houses of Congress.
Trump would never resign in a million years.
And impeachment in the House does NOT mean removal from office. A conviction in the Senate is necessary for that to happen, and the country will be torn apart in that event.
The POS Romney will NEVER be president. No way in hell.