"I really don't see to much difference between the right and left in America."

That's probably because you've mistaken the "left" for Obama and the Democratic party.

The real left is Nader, the Green party, the libertarians, the ACLU, and all others that would challenge the powerful - that's what makes them left wing.

Obama just pretended to be left-wing to win the election.
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"making the earth a common treasury for all, both rich and poor." Gerrard Winstanley; April 20, 1649