We all know that Obama has been among our very worst presidents. It has nothing to do with promises. He has almost singlehandedly reversed 50 years of progress on race relations. Whether it was done for cynical political purposes or because his background left him so conflicted that he has overcompensated with anti-white racism, I can't say.
His demagoguery has gone well beyond race. He routinely casts every decision as a clearcut choice between good, represented by him, and unthinking, ignorant, malicious evil, represented by his opponents. Such an approach further divides an already severely divided country and encourages hate and violence rather than reasoned debate.
His accomplishments are minimal and dramatically outweighed by his failures. In addition to dividing the country in a way not seem since Lincoln, his signature accomplishment ,obamacare, is an obvious failure, as was totally predictable. The middle east is in chaos. He managed to restart the Cold War, and we may be closer to nuclear war than we have been in 40 years.
He has treated the Constitution as if it were his personal roll of toilet paper. His one lasting legacy may well be to have transformed our country beyond recognition with his illegal immigration policies. He has managed to put us well on the way to being a latin american tin pot banana republic, only with a large element of islamic terrorism thrown in. Anyone who objects is called "unamerican" by the least "American" president we've ever had.