If the current polls hold, Barack Obama will win the White House on November 4 and Democrats will consolidate their Congressional majorities, probably with a filibuster-proof Senate or very close to it. Without the ability to filibuster, the Senate would become like the House, able to pass whatever the majority wants.

Though we doubt most Americans realize it, this would be one of the most profound political and ideological shifts in U.S. history. Liberals would dominate the entire government in a way they haven't since 1965,...