Steve and Robin Perfect are flying the flag to honor their son, who is bound for Iraq with the Idaho Army National Guard.
But the Copper Ranch Homeowners' Association says the flag violates their rules.
A property manager says it's not about the flag, but the condo bylaws.
The Perfects are getting support from their U.S. senator, Republican Mike Crapo.
He says federal law protects the right to fly the flag.
Robin Perfect tells the Idaho Mountain Express it's been a "nightmare."