PHOTOS: President Trump and Sheriff Joe Arpaio
MARSHALLTOWN, IA - JANUARY 26: Sheriff Joe Arpaio (R) of Maricopa County, Arizona endorses Republican presidential candidate Donald Trump prior to a rally on January 26, 2016 in Marshalltown, Iowa. Trump said today he would not participate in the next Republican debate hosted by Fox. (Photo by Scott Olson/Getty Images)Scott Olson
MARSHALLTOWN, IA - JANUARY 26: Sheriff Joe Arpaio (R) of Maricopa County, Arizona endorses Republican presidential candidate Donald Trump prior to a rally on January 26, 2016 in Marshalltown, Iowa. Trump said today he would not participate in the next Republican debate hosted by Fox. (Photo by Scott Olson/Getty Images)Scott Olson
MARSHALLTOWN, IA - JANUARY 26: Sheriff Joe Arpaio (R) of Maricopa County, Arizona endorses Republican presidential candidate Donald Trump prior to a rally on January 26, 2016 in Marshalltown, Iowa. Trump said today he would not participate in the next Republican debate hosted by Fox. (Photo by Scott Olson/Getty Images)Scott Olson
MARSHALLTOWN, IA - JANUARY 26: Sheriff Joe Arpaio (R) of Maricopa County, Arizona endorses Republican presidential candidate Donald Trump prior to a rally on January 26, 2016 in Marshalltown, Iowa. Trump said today he would not participate in the next Republican debate hosted by Fox. (Photo by Scott Olson/Getty Images)Scott Olson
Scott Olson
LAS VEGAS, NV - FEBRUARY 22: Maricopa County, Arizona Sheriff Joe Arpaio speaks during a rally for Republican presidential candidate Donald Trump at the South Point Hotel & Casino on February 22, 2016 in Las Vegas, Nevada. Trump is campaigning in Nevada for the Republican presidential nomination ahead of the state's Feb. 23 Republican caucuses. (Photo by Ethan Miller/Getty Images)Ethan Miller
CLEVELAND, OH - JULY 21: Maricopa County Sheriff Joe Arpaio gestures to the crowd while delivering a speech on the fourth day of the Republican National Convention on July 21, 2016 at the Quicken Loans Arena in Cleveland, Ohio. Republican presidential candidate Donald Trump received the number of votes needed to secure the party's nomination. An estimated 50,000 people are expected in Cleveland, including hundreds of protesters and members of the media. The four-day Republican National Convention kicked off on July 18. (Photo by John Moore/Getty Images)John Moore
CLEVELAND, OH - JULY 21: Maricopa County Sheriff Joe Arpaio gestures to the crowd while delivering a speech on the fourth day of the Republican National Convention on July 21, 2016 at the Quicken Loans Arena in Cleveland, Ohio. Republican presidential candidate Donald Trump received the number of votes needed to secure the party's nomination. An estimated 50,000 people are expected in Cleveland, including hundreds of protesters and members of the media. The four-day Republican National Convention kicked off on July 18. (Photo by John Moore/Getty Images)Alex Wong
PHOENIX, AZ - AUGUST 22: U.S. President Donald Trump speaks to a crowd of supporters at the Phoenix Convention Center during a rally on August 22, 2017 in Phoenix, Arizona. An earlier statement by the president that he was considering a pardon for Joe Arpaio,, the former sheriff of Maricopa County who was convicted of criminal contempt of court for defying a court order in a case involving racial profiling, has angered Latinos and immigrant rights advocates. (Photo by Ralph Freso/Getty Images)Ralph Freso