This is mostly about normalizing “impeachment” so that Trump’s two impeachments don’t look as bad. This is a classic Republican tactic: when your guy gets caught doing “thing” start slinging “thing” around at your enemies until it loses all meaning.

Similar tactic to co-opting “fake news”, “woke”, “feminism”, and “critical race theory”. All were terms that threatened to undermine the conservative ideology, and so were quickly hurled around as insults until their original meaning was completely distorted.