Rep. Shelley Berkley’s Senate campaign released an internal poll this afternoon after two new public autodial polls found the Democrat down by at least 6 points.

A memo from the Mellman Group polling firm reported that Berkley led Republican Sen. Dean Heller, 41 percent to 38 percent, with 11 percent undecided. The campaign released a poll last week that had Berkley ahead by an identical margin.

“As you know, every public poll in the 2010 Senate race proved to be far off the mark,” the polling memo stated in reference to Senate Majority Leader Harry Reid’s (D-Nev.) race last cycle. “So it is with the 2012 polling.”

The Berkley poll of 600 likely voters was conducted Oct. 15-17 with a 4-point margin of error.

Heller has led in virtually every public poll released to date. The public polls released this morning included a Rasmussen Reports survey that had Heller reaching 50 percent support and up 7 points over Berkley. The other was a SurveyUSA poll commissioned by the Las Vegas Review-Journal in which Heller led 46 percent to 40 percent.

Roll Call rates the race as a Tossup.