Donald Trump’s one-time fixer Michael Cohen is the former president’s “sworn enemy” — and the former president “will stop at nothing” to destroy him, according to a MSNBC legal analyst. Lisa Rubin appeared on MSNBC’s “Deadline White House” on Tuesday to discuss Trump’s upcoming criminal court case linked to accusations that he paid hush money to an adult film star to cover up an affair before the 2016 presidential election. And she reminded viewers of Trump’s belief in “the importance of Michael Cohen.” She pointed to Trump’s $355 million fraud case in Manhattan civil court — and the way his t…