German Chancellor Olaf Scholz urgently called for greater military aid to Ukraine and warned of the dire consequences of a Russian victory, just before departing for Washington on Thursday to meet US President Joe Biden and congressional leaders. In a guest column in the Wall Street Journal newspaper, Scholz warned Ukraine’s allies against reducing military support for the embattled country, which has been fighting against a full-scale Russian invasion for nearly two years. Scholz reiterated that message in Berlin, saying that Ukraine’s supporters must send a clear signal to Russian President …