Historian: Trump told me he could have prevented Civil War

Jon Meacham, the author of "American Lion: Andrew Jackson in the White House," on MSNBC's Morning Joe this morning:

• President Trump told him, a year ago, that he could have struck a deal to prevent the Civil War.
• Meacham described yesterday's Jackson kerfuffle as a projection of Trump's "fundamental and enveloping narcissism."
• The kicker: Meacham said he and Trump talked last year about presidents the then-candidate admired, and "Jackson never came up".