Because Democrats are actually trying to legislate for all Americans and not just make sure that the wealthiest in our nation continue to be the only ones benefitting from what is the gridlock that the Republicans offer the nation.
As much as people like to complain the Democrats have been winning, and have been getting stuff done. But they need to get more done, and that is going to take Americans across the nation voting in even more Democrats to show that they are ready to get some serious work done.