Trump remarked to a group of African-American leaders during Black History month,

Frederick Douglass is an example of somebody who’s done an amazing job and is getting recognized more and more, I notice.

Trump’s phrasing implies he thought Frederick Douglass was still alive. Douglass was an escaped slave and national leader of the abolitionist movement in the 19th century.

Later that month, Trump later signed legislation to honor the 200th anniversary of Douglass’ birth.

The Washington Post – Trump implied Frederick Douglass was alive. The abolitionist’s family offered a ‘history lesson.’
The Atlantic – Donald Trump’s Narrative of the Life of Frederick Douglass
Politico – Trump signs law to honor 200th anniversary of Frederick Douglass’ birth