I can relate to your problem as my mother is a die-hard Obamabot.
Is it possible to take your son to Budapest, Hungary and force him to visit the "House of Terror?"
It's a museum dedicated to the tortured and murdered Hungarians who were preyed upon by Soviet KGB and other secret police agents.
Think he might see the light if he understands what it's like to live underneath the stomping boot-heels of Communists?
http://www.budapest.com/TerrorHouseBudapest.htm
http://en.wikipedia.org/wiki/House_of_Terror
PS... Budapest is a beautiful city.
I wish I could take him somewhere. Maybe he will still wake up.
Just get the kid a passport and tell him not to come back until he has spent at least 6 months in a communist country.