Nevada Sen. John Ensign (R) said that legalized prostitution should remain a local issue in his state, breaking with Senate Majority Leader Harry ReidHarry ReidThis obscure Senate rule could let VP Mike Pence fully repeal ObamaCare once and for all Sharron Angle to challenge GOP rep in Nevada Fox's Watters asks Trump whom he would fire: Baldwin, Schumer or Zucker MORE (D-Nev.), who has called for it to be banned. 

Reid addressed a joint session of the state legislature this week, where he said prostitution should be made illegal in all Nevada counties in order to make the state more appealing to businesses. Ensign countered that it should be a "county by county issue."

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"You know, that's a county by county issue and I think and it should be left to the counties," said Ensign after a Wednesday town hall meeting, according to KTNV-TV.

The remark is likely to raise eyebrows, considering that Ensign is in the midst of trying to rebuild his political reputation after admitting to having an affair with Cindy Hampton, a former campaign aide. Ensign faces reelection in 2012.

The senator, who used to serve in the Senate GOP conference leadership, faces an investigation from the Senate Ethics Committee into whether or not he broke rules by helping Hampton's husband Doug find lobbying work. 

But after keeping a low profile since the affair was revealed in 2009, Ensign has gotten back on the trail, holding a series of town-hall meetings with Nevadans across the state.

Brothels are quite powerful in the smaller, rural counties where prostitution is legalized.

Ensign has continued to face questions about his affair at the gatherings. He may also have to overcome a tough primary challenge in order to win reelection: GOP Rep. Dean HellerDean HellerRed-state Dems in Supreme Court pressure cooker This week: House GOP faces make-or-break moment on ObamaCare Shutdown politics return to the Senate MORE (Nev.) is thinking about challenging Ensign. 

Democrats are gearing up to take down Ensign, searching for top recruits to run against him.