Politics can be a dirty game—especially if you are forced to use a tiny restroom.

Appearing on Tuesday’s episode of “The Daily Show” to promote her new book, “A Fighting Chance,” Massachusetts Senator Elizabeth Warren talked about the struggle for women to be treated equally in government. To highlight her point, Warren told host Jon Stewart how, for years, female legislators were forced to use the Senate’s tiny ladies’ room.

“This year, for the first time, we now have 20 women in the United States Senate,” Warren said. “But there was just one, tiny, little women’s bathroom.”

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“I never saw the men’s room, but they seemed to come out OK,” Warren joked.

The Massachusetts Senator revealed that it wasn’t until recently that the Senate finally made it’s women’s restroom bigger.

“The United States Senate is changing,” she said. “We now have a bigger ladies’ room.”

Beyond the toilet humor, Warren talked seriously about the struggle to reform a government that caters to the interests of corporate lobbyists.

“Washington works for those who can hire armies of lobbyists and lawyers,” Warren said. “If you’re a huge corporation, if you’re a billionaire—boy, your voice gets heard in that place.”

Check out more from her interview with Stewart in the video embedded below.