Sen. Mark PryorMark Lunsford PryorMedicaid rollback looms for GOP senators in 2020 Cotton pitches anti-Democrat message to SC delegation Ex-Sen. Kay Hagan joins lobby firm MORE (D-Ark.) has a narrow lead over Rep. Tom CottonThomas (Tom) Bryant CottonOvernight Defense: Fallout from tense NATO summit | Senators push to block ZTE deal in defense bill | Blackwater founder makes new pitch for mercenaries to run Afghan war Hillicon Valley: DOJ appeals AT&T-Time Warner ruling | FBI agent testifies in heated hearing | Uproar after FCC changes rules on consumer complaints | Broadcom makes bid for another US company | Facebook under fire over conspiracy sites Hillicon Valley: Justice Department appeals AT&T-Time Warner ruling | New report on election security | FBI agent testifies in marathon hearing MORE (R-Ark.) in a new Democratic poll.

Pryor leads Cotton by 45 percent to 43 percent in the poll, conducted by Democratic firm Hickman Analytics.

Partisan polling in Arkansas, especially, have shown very different results. Democratic firms have consistently found Pryor with a narrow lead in the race, while GOP firms have for months found Cotton in the lead. A new nonpartisan poll from CNN released Friday morning found Cotton up by two percentage points, in line with other surveys that have found a tight race in Arkansas.

The live-caller poll of 700 likely voters was conducted from Aug. 26-Sept. 3 calling cellphones and land lines, and has a margin of error of plus or minus 3.7 percentage points.