“But multiple Republican lawmakers and groups have raised concerns that the JEDI contract was built specifically with AWS in mind, raising concerns over market competition and unfair treatment. “

I am from east Europe. I know corruption when i see it. Suddenly if Oracle is left out of the game, up they pop with unfairness and other smoke grenades for the unaware.

Also as a technical person, integration at this scale between two providers can be a PITA exercise. Best to chose one.