The vice president is taking his turn at globe-trotting next week, heading for Turkey, Morocco and Ukraine. The latter is the most embroiled, with Russia still denying that it’s sending troops over the border to aid rebels in separatist strongholds. But it’s the Turks who’ve become increasingly troublesome allies. They resisted U.S. strategy in Syria, especially when it sought to arm Kurdish fighters they feared might assist rebels in Turkey. We’ll see whether President Erdogan is ready to listen now that Biden has apologized for suggesting Ankara had helped ISIS.