Expert reveals Trump's saving grace has become one of his many 'Achilles heels'

There's one trick President Donald Trump relies on when the whole world seems to be crumbling around him, but that trick may now be one of his many Achilles heels, according to one expert.

Journalist Michael Wolff, who has written four books about Trump, said during a new episode of "Inside Trump's Head," a podcast he co-hosts with Joana Coles of The Daily Beast, that Trump often relies on his strongman persona to "pull him through" when times get tough. Wolff said Trump learned early on...