Article continues below advertisementDonald Trump and Melania Trump's marriage is under intense scrutiny, as insiders suggest the couple's romance is hanging on by a thread. "They clearly do not inhabit a marriage as we define marriage. They live separate lives. They are separated. The marriage is crumbling," biographer Michael Wolff told a news outlet.Article continues below advertisementDonald Trump and Melania Trump 'Live Separate Lives'Source: MEGADonald Trump and Melania Trump tied the knot in 2005.