“This is formal impeachment proceedings,” Nadler said in an interview with CNN’s Erin Burnett.
Nadler doesn’t know his grammar. He means “these are formal impeachment proceedings”, not “this is impeachment proceedings”.
When Trump has ever misspoken in this manner, he is roundly criticized.
OTOH, Toad of Nadler Hall will end up on display at Uncle Benito’s Esso Station...