One of the greatest American presidents, Franklin Delano Roosevelt built a coalition of labour, ethnic, urban, low-income and African American voters that underwrote the Democratic Party's national ascendancy from the 1930s to the 1980s. Over his four terms, he promoted the New Deal – the greatest reform programme in US history – to meet the challenges of the Great Depression, led the United States to the brink of victory in the Second World War, and established the modern presidency as the driving force of American politics and government.