America's self-proclaimed "toughest sheriff," Arizona's Joe Arpaio, is headlining a GOP event in New Hampshire this weekend, prompting speculation that he may have interest in a presidential run in 2012. 

Arpaio, the controversial sheriff of Arizona's Maricopa County, has made waves for his hardline stance on illegal immigration. 

He is currently embroiled in a lawsuit with the U.S. Department of Justice, which claims Arpaio has not cooperated with an investigation into whether his immigration policing policies have violated civil rights. 

An Arpaio political adviser told CNN that the sheriff is not heading to the Granite State to test the presidential waters, but added: "People just don't go to New Hampshire if they are not interested in these things."