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Hillary Clinton: 'I'm not nervous at all' about Sanders closing gap in polls

"No, I'm not nervous at all,'' she told Savannah Guthrie on TODAY Wednesday.

Though Democratic rival Sen. Bernie Sanders closing the gap in the polls and even taking the lead in two key battleground states, Hillary Clinton says she is not fazed by the surge in his campaign.

"No, I'm not nervous at all,'' she told Savannah Guthrie on TODAY Wednesday. "I'm working hard, and I intend to keep working as hard as I can until the last vote or caucus-goer expresses an opinion. I'm excited about where we are."

Clinton leads Sanders 48 percent to 41 percent in the latest New York Times/CBS News poll after having more than a 20-point lead a month ago. Sanders also boasts a five-point lead over Clinton in the key state of Iowa in the latest Quinnipiac University poll and a four-point lead over her in New Hampshire in the latest Monmouth University poll.

In a rally in Ames, Iowa, on Tuesday, Clinton told supporters that it's time to "get real" about the differences between her and Sanders.

"I think we're in that stage of a campaign where we've each been introducing ourselves, we've been talking about our particular views on issues, and now it's time to draw some contrasts,'' Clinton told Guthrie. "Now look, the contrast on substantive issues between me and Sen. Sanders pales in comparison between us and Republicans, but there are substantive differences. I think it's only fair that the voters know what the differences are."

Clinton cited her opposing views to Sanders on gun safety and health care and noted that she has not underestimated his campaign.

"Not at all, I had a different sense of the rhythm of this campaign,'' she said. "I've been laying out very specific policies for months now and telling people how I would pay for them. I'm asking that Sen. Sanders does the same thing. We need to move now from generalization to specifics so people can see what the differences are."

This story originally appeared on TODAY.com