The ex-president claimed the former House speaker is "a curse to the Republican Party."
Republicans "will not be impressed by the sight of yes-men and flatterers flocking to Mar-a-Lago," said the former House speaker, who sits on the Fox board.
The upcoming event highlights a continuing GOP divide.
The former House Speaker proclaimed Joe Biden's 2020 win "entirely legitimate,” adding, "The results were decisively confirmed."
The president tried to blame Fox board member Paul Ryan for unfavorable coverage on the network.
The Fox Business host questioned the "stunning silence" from Paul Ryan and John Boehner in the week after the State of the Union address.
The former vice president inaccurately claimed the Sanders campaign “doctored” a video of his remarks about Social Security.
Pelosi is the only woman to hold the office of House Speaker, and the first speaker in 60 years to reclaim the gavel after losing it.
On Thursday, the president blamed the former House speaker for Romney's electoral defeat seven years ago.
The former House speaker reportedly credited himself with saving Trump from bad "knee-jerk" decisions.