“Kimberly Guilfoyle was preparing for her congressional hearing to become U.S. ambassador to Greece when she reached out to a Trump donor with an urgent request: She needed $100,000 that she said she owed American Express—in a way that wouldn’t leave a paper trail,” the Wall Street Journal reports.Said Guilfoyle, in a message on Signal: “It won’t show up anywhere if you wire money to American Express. Please.”