[T.B. Yoits]

Does the U.S. government have contracts with Amazon? Yes

Is Senator Liawatha Warren a member of the U.S. government? Yes

Does Amazon sell Senator Warren's own books? Yes

Did Senator Warren, a member of the U.S. government, direct Amazon, a contractor for the U.S. government, to stop selling a third party's book? (on official government letterhead no less) Yes

Senator Liawatha Warren committed a crime, violated the Senate's ethics rules, and also committed a tort against the book author.

[AndyJackson]

Violation of civil rights under color of law.