In Arkansas, the NBC-Marist poll found Sen. Mark Pryor (D-AR) leading Rep. Tom Cotton (R-AR) 51 percent to 40 percent. That's the third poll in the last month or so to show Pryor with a double-digit lead.
In Georgia, against each possible Republican challenger surveyed, Democrat Michelle Nunn either narrowly trails or leads by a small margin according to the NBC-Marist poll:
• Versus Rep. Paul Broun, Nunn gets 42 percent while Broun gets 43 percent.
• Versus Rep. Jack Kingston, Nunn and Kingston each get 43 percent.
• Versus Rep. Gingrey, the poll found Nunn getting 44 percent and Gingrey getting 42 percent.
• Versus former Secretary of State Karen Handel, Nunn leads 42 percent to 39 percent.
• The best showing for Republicans, the poll found, is a matchup between David Perdue and Nunn. In that scenario Perdue leads 45 percent to 41 percent.
The Journal-Constitution poll had somewhat better results for Nunn. Here are that poll's findings:
• Versus Handel, Nunn leads 49 percent to 41 percent.
• Versus Kingston, Nunn leads 50 percent to 40 percent.
• Versus Perdue, Nunn leads 46 percent to 45 percent.
• Versus Broun, Nunn gets 51 percent while Broun gets 38 percent.
• Versus Gingrey, Nunn gets 52 percent while Gingrey gets 37 percent.
Lastly, in Kentucky, Secretary of State Alison Lundergan Grimes (D-KY) trails Senate Minority Leader Mitch McConnell (R-KY) by one percentage point, with McConnell getting 46 percent and Grimes getting 45 percent, according to the NBC News-Marist poll.
This story was updated.