Subtle Bias, But Bias All the Same

I'm watching a PBS special on James Garfield, and I'm annoyed as hell that on an election map they TWICE switched the standard party colors, making Democrat states red and Republican blue. Given the nature of the 1880 election, this gives the average viewer the impression that the oppressive, violently racist South of the time was Republican, and that the Democratic North saved the day. In fact, the GOP ran on a platform of civil rights and barely out-polled the Democratic former Confederacy. #LeftistAgenda