Mystery Solved. These calls are NOT coming from The Heritage Foundation. They almost certainly originate from telemarketer The Heritage COMPANY. http://www.theheritagecompany.com/
Heritage Foundation. My number is on the "Do Not Call" list (which is a national joke, incidentally), and this organization has been told not to call me, but it persists in doing so. Notifying the FTC is a waste of time, because it does nothing. The best way to stop these calls is to block the number(s).
They call here every day around 6:00 pm. I answered this time and got an Asian woman who could barely speak understandable english. She claimed to be the Heritage Foundation. I am reporting them to the REAL Heritage Foundation in Washington DC.