While I don't care for Obama's politics, I disagree with the OP premise. I believe, in general, liberals will look back upon his presidency as favorably as conservatives look at Reagan's. From the passage of Obamacare to his attack of the coal industry and the re-establishment of diplomatic ties to Cuba, he'll leave office with the country shifted farther to the left than ever before. Which is what he intended to do. I didn't see Bill Clinton do that and I certainly didn't observe either Bush leave the country farther to the right after their presidencies.