Hillary Clinton on Tuesday night was unable to explain the difference between Democrats and socialists.

"Uh, you'd have to ask… I am not one," Clinton said after MSNBC's Chris Matthews asked her whether or not she identified as a socialist during an interview on Hardball.

As Clinton fumbled question, Matthews even gave the candidate an out by saying, "I'd say you're a pretty typical Democrat…but is that a question you want to answer or would you rather not?"

"I can tell you what I am," Clinton said. "I'm a progressive Democrat who likes to get things done, and who believes that we are better off in this country when we're trying to solve problems together, getting people to work together. There will always be strong feelings and I respect that, from the far right, the far left, the libertarians, whoever they might be. We've got to get people working together, we've got to get the economy fixed, we've got to get all our problems really tackled."

Self-identified socialist candidate Bernie Sanders, Clinton's main challenger in the Democratic primary, has effectively shifted the Democratic Party's base to the left during the 2016 primary, and on the trail Clinton has shifted her rhetoric to the left to match Sanders. While the former Secretary of State has become more liberal in respect to the KeyStone XL Pipeline, the Trans Pacific Partnership and her strategy to combat terror in the Middle East, she refrained from identifying as a socialist, like Sanders.

Rep. Debbie Wasserman Schultz, D-Fla., made a similar flub while being interviewed by Matthews in July, when she focused on Republicans instead of explaining the difference between a Democrat and a socialist.