President-elect Trump criticized famed pollster Ann Selzer, who is retiring, and called for an investigation into an Iowa survey she conducted that shook up the race days before the election.

“A totally Fake poll that caused great distrust and uncertainty at a very critical time. She knew exactly what she was doing,” Trump posted to his Truth Social site.

In the post, Trump thanked the “GREAT PEOPLE OF IOWA” for their votes, despite alleged possible “ELECTION FRAUD” by Selzer and the newspaper that published the poll, The Des Moines Register.

“An investigation is fully called for!” Trump added.

Just days before the election, Selzer’s survey, which found Vice President Harris leading Trump in Iowa, sent shockwaves nationwide. Trump went on to win the state by more than 20,000 votes.

Selzer announced in a Sunday column she will retire from the Register’s Iowa Poll.

Selzer, who has worked on a contract basis for the Register since 1997, said she would have liked to have made the announcement after polling lined up with the election results and admitted “it’s ironic” that it’s the opposite.

Selzer said she notified her employers of her decision more than a year ago.