In any election, it's hard to know whose word to trust. That's why the criticism of Donald Trump by those who served with him in the White House and by members of his own party is so striking. Dozens of people who know him well, including the 91 listed here, have raised alarms about his character and fitness for office - his family and friends, world leaders and business associates, his fellow conservatives and his political appointees - even though they had nothing to gain from doing so.