[Colinsky]

“Dr.” say’s he’s sharp as a tack, but he can’t be allowed to answer questions by the press.

Depends on what your definition of "tack" is.

18. Equipment or accessories for horses such ias saddles, stirrups, bridles, halters, reins, bits, and harnesses.

[ridesthemiles]

Biden ran with the bit in his teeth the other night, IMO.