Tell you what he did do. Obama created 15.5 million new jobs since 2010, dropped the unemployment rate by 5.4%, negotiated a deal to block a nuclear Iran, eliminated Bin Laden, ended the Iraq war (which Trump supported, by the way), turned around the US auto industry, legalized gay marriage, allowed gays and lesbians to serve in the military, reversed Torture policies considered inhumane as of the Geneva convention, normalized relations with Cuba, put Medicare on sounder financial footing, increased abroad opinion of the US (something that Trump has only done with Russia), gave the FDA power to regulate Tobacco, reduced the threat of nuclear weapons abroad, cut veteran homelessness in half, cut the US deficit, improved food safety, improved healthcare for children, abandoned the space shuttle and the moon landing mission, saving billions of dollars, and cut down on cold war era military spending. Finally, he is the first president since Eisenhower not to have a major scandal during the presidency. Yes, really