Duped?!?!?! Was that sarcasm?
Sir, the only real question to ask at this point is: Why there is no legitimate opposition party in the United States of America, Inc.?
First and foremost was vertical division of power between the states and the government they created.
With the 17th Amendment, all powers collapsed into Washington DC.
That is why there is no opposition. The money, wealth, power are too good to upset.