For broader perspective, I found this a very useful New Yorker piece by Joshua Yaffa. Here is one bit from it:
In advance of Trump and Putin’s first meeting, on the sidelines of the G-20 summit in Hamburg, I decided to ask Russia’s sharpest and most experienced political journalists and investigative reporters what they thought of this coverage…
On the whole, said Mikhail Zygar, a political journalist and the author of “All the Kremlin’s Men,” a well-sourced insider look at the cloistered world of Russian politics, the way the U.S. media has covered the Russia scandal has made “Putin seem to look much smarter than he is, as if he operates from some master plan.” The truth, Zygar told me, “is that there is no plan—it’s chaos.”
The most important thing that U.S. reporters should remember, Shleinov told me, is that “money is fleeing Russia in all directions, people are trying to invest anywhere they can, to get their assets out before the secret services or their competitors show up and try and take them all.” On the whole, Shleinov said, a wealthy Russian—even a politically connected one—is likely buying real estate abroad “as a place to run to,” not on Putin’s orders.
Speculative, but interesting throughout, there is also much on the possible Trump-Putin connections.