Historian Jon Meacham on Trump: We're in 'uncharted waters'
01:20Pulitzer Prize winning presidential biographer Jon Meacham reacts to the dark rhetoric of Pres. Trump saying he hopes it's not a sign things will continue to get worse.
Pulitzer Prize winning presidential biographer Jon Meacham reacts to the dark rhetoric of Pres. Trump saying he hopes it's not a sign things will continue to get worse.