SAN DIEGO, United States (AFP) — US presidential hopeful Hillary Clinton tore into her likely election rival Donald Trump as never before Thursday, saying his foreign policy is dangerously incoherent and labeling him unfit for office. “He is temperamentally unfit to hold an office that requires knowledge, stability and immense responsibility,” Clinton said, cranking up the rhetoric in what is already a deeply acrimonious election. “This is not someone who should ever have the nuclear […]