Romney favors increased legal immigration to the United States and opposes illegal immigration, but he would respect the work permits to younger illegal immigrants that President Obama had granted. In 2006, Romney said he would like to see undocumented immigrants register with the government, pay taxes, and apply for citizenship, but that they should not be given any priority or special treatment over immigrants who have applied for citizenship legally. During the 2008 presidential primary campaign, he embraced the support of Arizona's Maricopa County Sheriff Joe Arpaio, known for his very tough stance on immigration. Arpaio served as honorary chair of Romney's Arizona campaign organization and as a campaign surrogate for Romney on immigration.