SOURCE DOCUMENT FEBRUARY 16--Presidential contender Donald Trump, who has vowed to stanch the flow of narcotics and criminals entering the U.S. from Mexico, once wrote to a judge urging leniency for a friend who was convicted of distributing kilos of cocaine that had been smuggled into the country from Colombia, court records show. In advance of Joseph Weichselbaum’s November 1987 sentencing by a U.S. District Court judge, Trump wrote that the drug trafficker was “conscientious, forthright, diligent and a credit to the community.” At the time Trump wrote his character reference letter, Weichselbaum, then in his mid-40s, was already a...