Sen. Mark Pryor (D-AR) leads challenger Rep. Tom Cotton (R-AR) by 6 percentage points according to a newly released internal poll.

The poll found Pryor leading Cotton, 45 percent to 39 percent among likely voters. Libertarian candidate Nathan LaFrance got 3 percent while Green Party candidate Mark Swaney got 2 percent, the poll found.

Furthermore, an 8 percent of those surveyed said there was a “fair chance” they would support Pryor. Meanwhile 9 percent said there is a “fair chance” they might decide to back Cotton.

“The results further suggest that the vote ceiling for Senator Pryor is higher than Tom Cotton’s,” pollster Andrew Maxfield wrote in the polling memo.

The poll was first reported by Politico.

The poll was conducted by Harstad Strategic Research on behalf of the Pryor campaign. The poll surveyed 807 likely voters by telephone between July 7 and 10. It had a margin of error of plus or minus 3.5 percentage points.

Read the memo below:

Arkansas U.S. Senate Update-HarstadResearch

The TPM Polltracker average gives Cotton a 5.6 percentage point lead over Pryor.