Who is this? Yeah, no one. It isnt the GOP any more than Al Sharpton is the Democratic Party.
Oh, Pearce is very well known in Arizona and was in the national news many times as he was the sponsor of AZ SB-1070 ("papers, plase"). He was also of of Sherriff Arpaio's (you know, the pink underwear guy) deputies and takes credit for the idea to stick inmates in tents outdoors. You know, like in concentration camps. He was also director of the Arizona DOT and then fired for being involved in tampering with a woman's driving record.
And avid birther and noted racist (he hates Latinos with a passion), he was also part of Arpaio's so-called "posse" that claimed it would provide incontrovertible evidence that Obama's birth certificate was forged.
Russell Pearce also has ties to white nationalist (neo-nazi) groups and also wrote an article for the National Alliance. He was also in cahoots with T. J. Ready, a well known Arizonan neo-nazi, whom Pearce himself ordained into the "priesthood" of the Mormon church. Of course, Russell Pearce claims that he knew nothing about T.J. Ready's apparent nazi ties.
Pearce pushed to reject federal funding of medicaid in Arizona. This move led to a recall election of him from the AZ state senate, an election that he lost in November 2011. He tried a comeback in 2012, but lost handily in the primaries.
But I understand why you know nothing of him, despite the fact that his antics have been on national news many times from 2009-2012, cuz you are an ignorant buffoon. Now, go scratch yourself and grunt real loud.