Michael McFaul @McFaul
Putin and Obama met in St. Petersburg in September 2013. Putin annexed Crimea 6 months later. The causal relationship between summits and Putin good/bad behavior is not so clear! — PolitiTweet.org
Kevin Rothrock @KevinRothrock
Number of Crimeas annexed since U.S. presidents resumed bilateral summits with Vladimir Putin: zero. https://t.co/XcBLkEt8ZP