The typical pettiness and vengefulness of the Obama administration was at full display with yesterday's expulsion of 35 Russian diplomats and the closing of two Russian estates in New York and Maryland. Obama also sanctioned the Russian external intelligence service FSB and the military intelligence service GRU as well as some of its leaders for doing their job.
The move was ostensibly over alleged but completely unproven Russian "hacking" to influence the U.S. election. But the real reason is likely Obama's loss of face after being left out of the successful negotiations of a new ceasefire in Syria.
True to form the Russian government responded with high-class trolling and generosity.