Secretary of State Marco Rubio is traveling this week to a gathering of top diplomats from NATO countries. He is sure to find allies alarmed, angered and confused by President Donald Trump’s desire to reestablish ties with Russia and escalating rhetorical attacks on transatlantic partners. Recent White House comments directed at NATO allies Canada and Denmark have only increased the angst, especially as new U.S. tariffs are taking effect. As he did at another meeting of allies last month, Rubio may be able to salvage a group consensus on the war in Ukraine, but he'll be hard-pressed to explain the latest insults.