The Democratic Party is the party of government, and most people hate the government. Why? Because increasingly they see it as corrupt, run by people they view as crooked. They don’t believe government is working for them, and if it’s not going to work for them, then they’d prefer to keep it as small as possible.
One party is seen as standing for big government, the other for no government. But neither is seen as truly working for the people. Both are seen as captive parties that owe allegiance to their big donors and ceaselessly cater to those wealthy interests.
For the whole story read Mike McCabe, WI Democracy Campaign