The result of the latest Elon University Poll shows that approval of Hagan, now at roughly 33 percent, has declined in four consecutive polls.
"The trend suggests the senator will face a tougher-than-expected re-election battle this November," said Dr. Jason Husser, assistant director of the Elon University Poll.
Further troubling for Hagan is the roughly equivalent disapproval of her job performance by women and men. Thirty-three percent of women and 34 percent of men surveyed approved of Hagan's work.
Hagan has been pummelled for months by negative advertising. Americans For Prosperity, funded in part by the Koch brothers, has alone spent more than $8 million so far on advertising attacking Hagan -- more than the group has funneled to any other race so far this election cycle.
North Carolina House Speaker Thom Tillis is widely considered to be the Republican best positioned to face Hagan. He has received implicit support from national Republicans but must win a competitive primary race to become the party's nominee.