NEW YORK — Eight months before the company that owns the National Enquirer paid $150,000 to a former Playboy Playmate who claimed she’d had an affair with Donald Trump, the tabloid’s parent made a $30,000 payment to a less famous individual: a former doorman at one of the real estate mogul’s New York City buildings. As it did with the ex-Playmate, the Enquirer signed the ex-doorman to a contract that effectively prevented him from going public with a juicy tale that might hurt Trump’s campaign for president. The payout to the former Playmate, Karen McDougal, stayed a secret until the...