B$
An most unusual move to use CHER to send to the Trump Admin.
The opening has never been popular at the top level, though a number of prominent players have employed it on occasion (for example, Richard Réti against Abraham Speijer in Scheveningen 1923 and Boris Spassky against Vasily Smyslov in the 1960 Moscow–Leningrad match). Soviet player Alexei Pavlovich Sokolsky (1908–1969) wrote a monograph on this opening in 1963, Debyut 1 b2–b4.