Maybe the American Democrats wouldn't feel so bored if they formed a shadow government like the British Tories.
The Shadow Cabinet (also called the Opposition Front Bench) is a senior group of opposition spokespeople in the Westminster System of government who together under the leadership of the Leader of the Opposition (or the leader of other smaller opposition parties) form an alternative cabinet to the government's, whose members shadow or mark each individual member of the government. Members of a shadow cabinet are often but not always appointed to a Cabinet post if and when their party gets into government. It is the Shadow Cabinet's responsibility to pass criticism on the current government and its respective legislation, as well as deciding where amendments to the legislation are necessary.
Of course, who wants to go on the record for or against anything when they're not even in office? Much safer to just wait for an election and test the wind.