Democratic challenger Paul Penzone says he doesn't see any reason to keep Sheriff Joe Arpaio's Tent City open if he defeats Arpaio in November.

"There's no need for it right now, and I know a lot of people are attached to it, but we need to let that go," Penzone says on this weekend's "Sunday Square Off."

Arpaio claims Tent City as one of his trophy achievements during more than two decades in office. The facility houses several hundred inmates -- some convicted. some awaiting trial -- in outdoor tents, where temperatures fall below freezing in winter and soar past 120 degrees in summer.

Penzone, who is making his second run in four years at ousting the Republican sheriff, also discusses:

-Whether he thinks Arpaio should resign after federal prosecutors announced last week they would file criminal contempt charges against the sheriff. The 84-year-old Arpaio is seeking a seventh term in office.

-Why he sued Arpaio for defamation over a TV ad that claims Penzone committed domestic violence.

WATCH: Arpaio challenger on why he sued sheriff for defamation

Arpaio was invited to appear on "Sunday Square Off," but he declined.

Penzone was employed by 12 News as an on-air expert on law enforcement before he announced his run for sheriff.

"Sunday Square Off" airs at 8 a.m. Sundays on 12 News, after "Meet the Press."