Other possible factors for Truman's victory included his aggressive, populist campaign style; broad public approval of Truman's foreign policy, notably the Berlin Airlift of that year; and widespread dissatisfaction with the institution Truman labeled as the "do-nothing, good-for-nothing 80th Republican Congress." In addition, after suffering a relatively severe recession in 1946 and 1947 (in which real GDP dropped by 12% and inflation went over 15%), the economy began recovering throughout 1948. The year 1948 was a banner year for the Democrats, as they not only retained the presidency but also recaptured both houses of Congress. It was also an unprecedented fifth consecutive presidential victory for the party, thus continuing what remains the only winning streak of more than two presidential elections by the Democratic Party since the Civil War. Since 1948, there has been only one streak of three consecutive presidential victories by any party (in that case, by the Republicans). The two largest third parties did not hurt Truman nearly as much as expected, as Thurmond's Dixiecrats carried only four Southern states, fewer than predicted. The civil rights platform helped Truman win large majorities among black voters in the populous Northern and Midwestern states, and may well have made the difference for Truman in states such as Illinois and Ohio. Wallace's Progressives received only 2.4% of the national popular vote, well below their expected vote total and slightly less than the Dixiecrats, and Wallace did not take as many liberal votes from Truman as many political pundits had predicted. Some analysts, including author Zachary Karabell, have even argued that the separate candidacies of Wallace and Thurmond were beneficial to Truman by removing the separate taints of communism and racism from the Democratic Party.