On Sunday, the Democratic horse race got a little tighter, and a little more tense.

According to the latest survey from Marist, NBC News, and the Wall Street Journal, Hillary Clinton leads Bernie Sanders in Iowa. But this isn’t news. What’s news is that her lead has dropped to just three points over the Vermont senator. In fairness, this is one poll, and in the average of all Iowa surveys, Clinton still leads by more than 10 points. But the median result of the past five polls is a Clinton lead of 9 percentage points, in line with the average and evidence of a tightening race. And this is on top of her large deficit in New Hampshire, where Sanders leads by 4 in the latest poll and just under 5 points in the average.

Clinton says she isn’t worried. “[Y]ou know these polls go up, they go down,” she said on Sunday in an interview with CBS News’ Face the Nation. “I stay pretty focused, as I think we all should, on what we have to do to build on the progress of the Obama administration, but go even further.” But her next sentence, an implicit jab at Sanders’ position on guns, belied that confidence. “And that’s why I have outlined a very significant agenda to raise wages and to take on the gun lobby and to be making America safe in every way that I can.”