Would they know about Amendment 15?
Would they know how life changing this Amendment was after the Emancipation Proclamation?
The letter R is for: Race
The right of citizens of the United States to vote shall not be denied or abridged by the United States or by any State on account of race, color, or previous condition of servitude. Passed on February 26, 1869.
While it took many decades for this Amendment to be enforced uniformly, this was the starting point.
And every good thing that happens needs a starting point.