re: #183 Patricia Kayden
Presidents will often work at their private residences - LBJ had the ranch in Johnson City, which included its own runway and comms station for the Secret Service (and they had phones everywhere, including the bathrooms).
Eisenhower’s farm in Gettysburg was also used for official business, including Khrushchev’s visit to the US.
That, by itself, isn’t a problem. It’s the frequency.
Oh, and Mar a Lago isn’t a private residence. It’s a golf club. And securing it for presidential needs is crazy (similar to the issues with securing Trump Tower).