Chelsea Clinton accidentally calls Bernie Sanders 'president'

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"We also need to strip away the immunity that President Sanders –– I'm sorry, excuse me. Sen. Sanders. I hope not President Sanders," Chelsea Clinton said at a campaign event.

Chelsea Clinton was in the Twin Cities Wednesday fundraising for her mother, Hillary Clinton, ahead of Minnesota's caucuses.

The slip up could be a sign that the Clinton campaign is feeling a little pressure. Sanders just narrowly lost to Hillary Clinton in Iowa's Democratic caucus. And a RealClearPolitics poll put Sanders up by almost 17 percent in New Hampshire ahead of the primary.

However, Hillary Clinton leads by roughly 20 percent in Nevada and 30 percent in South Carolina. Electoral events there follow New Hampshire's, and voters in those two states are considered more diverse, both racially and politically.