This morning I googled to confirm what s/he said. And it's true.
He [Frederick Douglass] used his oratorical skills in the ensuing years to lecture in the northern states against slavery. He also helped slaves escape to the North while working with the Underground Railroad. He established the abolitionist paper The North Star on December 3, 1847, in Rochester, NY, and developed it into the most influential black antislavery paper published during the antebellum era. It was used to not only denounce slavery, but to fight for the emancipation of women and other oppressed groups. Its motto was "Right is of no Sex - Truth is of no Color - God is the Father of us all, and we are all brethren."The usage of "North Star" has a long historical record. But I'm certain that someone as well-versed in history as our President is aware of this particular usage. Because it aligns so well with his core beliefs, knowing this brings a whole new depth of meaning and symbolism to what he's been saying about his own North Star all these years.