2008, Oregon was 36/27/37 (D/R/I)
2004, Oregon was 32/34/34 (D/R/I)
Independents backed Kerry 58-40 in 2004. In Portland, most unaffiliated voters register that way because they think the Democratic Party is too conservative.
Obama won the Independants by 23% in Oregon. According to this survey he is underwater again.