If Sen. John Ensign (R-Nev.) opts to run for reelection in 2012 he will have a tough road ahead, even with members of his own party. 

New numbers from Democratic-leaning Public Policy Polling found 48 percent of Republicans in the state would rather see Ensign step aside in 2012. Just 42 percent of Nevada Republicans want him to seek reelection.

And while Ensign currently trails all potential Democratic opponents, including Rep. Shelley Berkley (D-Nev.) 45 percent to 42 percent, the poll found Rep. Dean Heller (R-Nev.) leading every potential Democratic hopeful in an open-seat contest. 

Heller leads Berkley 51 percent to 38 percent in a hypothetical 2012 match up. 

Ensign has not yet indicated whether he will run for another term in 2012 following a scandal over his affair with the wife of a former campaign aide. 

Last month, the Department of Justice dropped its probe of Ensign over allegations that a cover-up of the affair was at work in a $96,000 payment made to the parents of Ensign's former mistress. The Federal Election Commission also dropped an investigation into the matter late last year. 

The Las Vegas Sun's political guru Jon Ralston predicted Wednesday that Ensign would not run in 2012, setting up a contest between Heller and Berkley. 

Even if Ensign decides to seek another term, he could still face a primary challenge from Heller, who has publicly suggested that Ensign remaining in the Senate could detract from the needs of the state. 

Ensign and Heller recently broke on the tax cut compromise reached by President Obama and Senate Republicans. Ensign opposed the deal, while Heller supported it. 

The poll also found that Republicans overwhelmingly regret their choice of Sharron Angle to be the party's nominee against Senate Majority Leader Harry Reid (D-Nev.) in 2010. A full 68 percent of Nevada Republicans said they should have nominated someone else.