More than a century after 1915, the deaths of 1.5 million Armenians cannot be denied — yet Washington is once again choosing ambiguity over clarity. President Donald Trump at a trilateral signing ceremony with Armenian Prime Minister Nikol Pashinyan and Azerbaijan President Ilham Aliyev in the White House in August. | Mark Schiefelbein / AP On Friday, the world commemorates what is widely recognized as one of the first genocides of the 20th century: The destruction of the Arm