President Donald Trump seems to have learned the lesson painfully gleaned by all his 21st-century predecessors: You can’t reset US relations with Vladimir Putin.

A week ago today, Trump had an hourlong phone call with Russian President Vladimir Putin. And after that, everything changed. The end of the affair: The U.S. president — who in January came into office claiming he could strike a peace deal with Putin on Day One;

Donald Trump finally called “bullshit” on Vladimir Putin this week, though nobody seems to quite know what it means. One explanation, and perhaps the best one, is that Trump, belatedly, recognized what has long been apparent to the rest of us: that Putin has been playing him,