Bernie Sanders in November held a slim 1-point advantage over Hillary Clinton in the same poll. | AP Photo Fox poll: Sanders soars in New Hampshire

Bernie Sanders has soared to a 13-point lead over Hillary Clinton in New Hampshire in a Fox News survey out Friday, nearly a month to the day that primary voters will make their decision at the polls on Feb. 9.

Sanders, who in November held a slim 1-point advantage over Clinton in the same poll (45 percent to 44 percent), this time took 50 percent of the vote to 37 percent for Clinton. Former Maryland Gov. Martin O'Malley earned 3 percent. Before Friday's poll, the latest CBS News/YouGov survey polling primary voters showed Sanders with a 14-point advantage over Clinton (56 percent to 42 percent) in mid-December.


The independent Vermont senator drew well with the under-45 crowd, outpolling the former secretary of state 55 percent to 31 percent in that demographic. Among men, Sanders leads by 23 points — 53 percent to 30 percent. He also leads among women, albeit by a smaller margin — 48 percent to 41 percent.

Among those earning $50,000 or less, Sanders outdrew Clinton 59 percent to 33 percent.

The poll, which was conducted via landline and cellphones Jan. 4-7, included 386 Democratic primary voters and has a margin of error of plus or minus 5 points.