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.

Previously, Newsom called Trump out for his name-calling tactics and referred to him as a “son of a b—h.” He also explained how the name-calling has impacted his family. “How do I explain that to my kid?