(FILES) US President Donald Trump talks to the press flanked by First Lady Melania Trump as he prepares to board Marine One for Beltsville, Maryland, in Washington, DC, on October 13, 2017. Extremely discreet in the White House and even more reserved since leaving Washington, Melania Trump is keeping observers guessing whether she will appear, however warily, on the campaign trail alongside her husband. Aloof and enigmatic, the Slovenian-born former model has been noticeably absent as husband Donald Trump makes his third bid for the White House. (Photo by Brendan Smialowski / AFP) (Photo by BRENDAN SMIALOWSKI/AFP via Getty Images)