Historians lean far left and present a distorted analysis of the people and events of world history. A recent poll of American history professors rated Barack Obama as one of the greatest American presidents and Donald Trump as one of the worst. FDR and Woodrow Wilson are almost always rated “great” presidents, while Warren Harding and Ulysses S. Grant are rated failed presidents. FDR and Wilson vastly expanded government spending and power, while Harding and Grant cut the size of government.