It undercuts Nadler’s credibility on impeachment. Not that he ever had much to begin with.
It also proved something that’s been pretty obvious for years; Adam Schiff has been a serial liar from the beginning.
[Update a couple minutes later]
Schiff town hall erupts into cries of “liar” and “treason.” They’re not wrong. Unfortunately, his seat is probably safe in that district, which is why he can get away with this.