According to this rambling article, he has houses in Hawaii (Oahu), Hyde Park (I’m assuming Chicago, not New York or London?), Martha’s Vineyard, and the Kalorama development inside Washington D.C. The latter is popular with current and ex-government types, celebrities, diplomats, and captains of industry. Some conspiracists believe he is running a “shadow government” from this location, and for this the offer two points of evidence: (1) He is a retired career politician who still lives in Washington, D.C. at least some times and (2) higher ups in the current administration are sometimes spotted at his house. This seems pretty weak to me. His house seems like a convenient place to have an offsite meeting where you would already have the maximum possible security presence and you might get some free advice from the former leader of the free world in the bargain. Giving take-it-or-leave-it advice would not be “running a shadow government”. Doing some fundraising and persuading at the request of the current party leadership would not be “running a shadow government”. So I don’t know but it seems unlikely.
There’s also some gobbledygook about Ukraine in the article. The only real data points we have on that are that (1) Obama instinctively opposed Hillary Clinton’s push for more or less unprovoked war on Libya (although he gave in), (2) he offered Ukraine only non-lethal aid following the invasion of Crimea, and (3) he supported the Minsk peace accord. We can only speculate now whether Russia would have invaded Ukraine under a Hillary Clinton administration, although I think they were scared enough of her that it may have motivated them to interfere with the 2016 U.S. election (after the U.S. almost certainly interfered in the 2014 Ukraine election, at least in terms of propaganda.) If they had, we can only speculate whether she would have responded with a no-fly zone or some other Cuban Missile Crisis level gamble. I think she might have. Now we need to look ahead and consider whether a second Trump administration will just give up the farm and allow Ukraine to be partitioned or conquered outright.