By Jackie Wattles and Alejandra Jaramillo, CNN

(CNN) — President Donald Trump on Saturday rescinded his nomination of tech billionaire Jared Isaacman to lead NASA, citing a “thorough review of prior associations.”

The president pledged in a Saturday social media post that a new nominee would be “mission aligned” and “put America first in Space.”

“After a thorough review of prior associations, I am hereby withdrawing the nomination of Jared Isaacman to head NASA. I will soon announce a new Nominee who will be Mission aligned, and put America First in Space,” Trump wrote on Truth Social.

The shake-up comes just days before the Senate was expected to vote on the nomination of Isaacman, who has twice traveled to space on private missions and has close ties to SpaceX chief Elon Musk.

The W

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