Even with the election still a few years away, polling could offer insight into potential candidate viability.

The California governor and his team mocked the vice president over his appearance at a White House "showdown" on Ukraine.

BIRD-BRAIN TREY GALLAGHER (A SO-CALLED FOX "NEWS" HOST THAT NOBODY HAS EVER HEARD OF) SAYS MY POSTS ARE “CHILDISH” AND “UNBECOMING” OF A LEADER — CAN YOU BELIEVE IT? MANY ARE SAYING FOX ("EDIT THE TAPES") NEWS SHOULD CANCEL HIS PATHETIC LITTLE "BEDTIME SHOW" IMMEDIATELY. THEY ARE… https://t.co/vQIEAjP8Ez