Maricopa County Sheriff Joe Arpaio has raised more than $2.5 million for his re-election campaign over the last year.
The 78-year-old Republican has served five terms as sheriff and plans to seek re-election in 2012.
Some of his contributions came from people who live in other states.
Arpaio had toyed with the idea of running for governor earlier this year, but he ultimately decided against it.
So far, Democrats haven’t come up with a candidate to oppose Arpaio.