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Kennedy vs. McKinney

The cases are not equivalent, though McKinney's interest is to conflate them. Note:

(1) McKinney was not recognized as a member of Congress (she doesn't exactly look the part AND she was not wearing her ID) while Kennedy was recognized.

(2) McKinney [allegedly] assaulted an officer while Kennedy did not.

I don't think Kennedy should have been spared the Breathalyzer test and am not condoning his behavior, but I don't see McKinney's cause for complaint, and I certainly don't see any racial angle.