Democrat Bernie Sanders on Monday jumped into the lead over former Secretary of State Hillary Clinton in the final Iowa polls, the first time he has led in the last eight polls.

The Vermont senator tops Clinton 49 percent to 46 percent in the Qunnipiac poll. The latest poll is good news for the Sanders campaign. The Real Clear Politics poll average shows Sanders trailing Clinton by 4 points, at 43.9 percent compared to Clinton’s 47.9 percent. But the latest survey suggests the momentum may be his. Clinton had topped the previous six polls of likely Iowa voters.

That Sanders may now have a slight lead in Iowa is a remarkable achievement for his campaign. The RealClearPolitics poll average taken on Nov. 4, 2015, had Clinton leading Sanders in Iowa by 30 points, 56.3 percent to 26.5 percent.

Sanders has effectively doubled his support in four months as his message increasingly resonates with Democrats — many of whom also have growing concerns about Clinton’s viability in a national election due to the e-mail and Clinton Foundation scandals, as well as her husband’s checkered sexual past.

The new Quinnipiac poll also shows Republican Donald Trump leading nearest rival Texas Sen. Ted Cruz by 7 points — with support from 31 percent of likely GOP voters.

But a Trump victory in Iowa may not be as certain as many in the media have suggested. The RealClearPolitics average has Trump leading Cruz by fewer than 5 points — 28.6 percent to 23.9 percent. Moreover, the new Quinnipiac poll revealed that 17 percent of likely GOP voters now support Sen. Marco Rubio, and his RCP average is now 16.9 percent, the Florida senator’s highest numbers in Iowa since the race began.