It’s the 19th anniversary of the House vote to impeach President Bill Clinton. Key Democrats are already planning to spend the 20th on the cusp of doing the same to President Trump.

Democrats must retake the House in the 2018 midterm elections first, which is why they are exercising caution now. There would also likely need to be more significant developments in special counsel Robert Mueller’s Russia investigation than the indictments of Paul Manafort, Rick Gates, George Papadopoulos, or even Michael Flynn, the former national security adviser.