Trump Tower in Chicago has an unusually large number of condominiums for sale or for rent.
Real estate professionals say that close to 11 percent of the 98-story building's 486 residential units are for sale.
The building has been the site of demonstrations since Donald Trump was elected president.
Real estate agent Carla Walker of KoenigRubloff Berkshire Hathaway says owners have paid $1.5 million and more for their condos. She says they don't want to see people hanging out and demonstrating.
Appraisal Research Counselors says the number of available condos is almost three times higher than other large condo buildings downtown. The 100-story John Hancock building has 26 out of 703 condos for sale.
Walker notes the luxury segment of the housing market is usually slower to move than other segments.