Former Democratic National Committee chair Howard Dean took a swipe at Rep. Tulsi Gabbard (D., Hawaii) on Monday after she met with President-elect Donald Trump earlier in the day.

After MSNBC host Chris Matthews described the meeting between Trump and Gabbard, which was reportedly meant to discuss a possible top job for the Democrat in the next administration, as "amazing," he turned to Dean for his opinion on the subject. Dean was quick to criticize Gabbard.

"Well, I mean, she's an interesting person, and the people from Hawaii basically have her tabbed as extremely ambitious with flexible principles," Dean said.

"She was a lefty for Bernie [Sanders], and now she's talking about running against Mazie Hirono, who's a left-wing or liberal senator from Hawaii," Dean explained. "So who knows what this is all about?"

Gabbard strongly supported Sen. Bernie Sanders (I., Vt.) during the Democratic presidential primary and even resigned her position as vice chair of the DNC in order to endorse and campaign for Sanders. Gabbard had been at odds with then-DNC chair Rep. Debbie Wasserman Schultz (D., Fla.).