"Must've been a Democrat," the longtime Republican joked to the Republic.
Ava Arpaio likely will be in a hospital for "two or three" days, her husband told the newspaper.
Arpaio served as sheriff of Maricopa County for 24 years until losing re-election to Democrat Paul Penzone in 2016.
The 86-year-old lawman made national news for his Tent City Jail where inmates were housed in Korean War era army tents, KSAZ reported.
Joe Arpaio was convicted of a criminal charge in July 2017 for refusing to stop traffic patrols that targeted immigrants. He was pardoned a month later by President Donald Trump.