Donald Trump & Mike Pence Make First Appearance as GOP Running Mates

Pence: 'Trump Understands the American People Like No Leader Since Reagan'

Sen. Sessions: 'Principled,' 'Experienced' Pence Is Great VP Pick for Trump

It's no secret that Elizabeth Warren is not a big fan of Donald Trump.

In recent weeks, she's gone on Twitter rants, calling the presumptive Republican presidential nominee everything from "a thin-skinned, racist bully" to "incoherent" and "truly bizarre."

Following Trump's announcement of Indiana Gov. Mike Pence as his running mate, the Massachusetts senator is now taking aim at both of them:

See Judge Jeanine react above.

Cleveland Beefs Up Security Measures Ahead of RNC

Luntz Lays Out What Trump Needs to Accomplish at the RNC

WATCH: Trump's Latest Ad Features 'Crooked Hillary' as a Wild Pokémon

Watch Special RNC Coverage Online, on the Fox News App & on Facebook Live

Manafort on #NeverTrump Movement's Demise: 'We Crushed Them'