This. In a hundred years Obama is going to be seen as a statesman and who had the fortune, good for the country, ill for his presidency, to be opposed by a violent reactionary movement in its death throes. He may be regarded as the man who saved the country from either a second civil war or becoming a fascist apartheid state -- holding the line just long enough that when the darkness did envelop the country after him it wasn't able to swallow everything up before it was rejected and American values were restored. Historians will play "What If?" games where Trumpism rose a decade earlier and the US became a white supremacist Dominionist state.
There have only been two men of character in the White House in the last fifty years: Carter and Obama. Though neither was able to accomplish much in an active direction they will be remembered as having cropped the Great Reaction by 4 years at the beginning and 8 years near the end, thus helping the nation survive that cancer.