Yes Oregon has not elected nothing since 2002 but keep this in mind. Obama has been horrific on civil liberties and Rand Paul like Ron Paul is much better on this issue than Obama and Clinton. Add that with Oregon being unstable economically I really do believe it will be close for this election.
Rand Paul won't be the nominee, and even if he is, he'll only do a point or two better than a generic R. Perhaps enough to force the Dem to spend money in the state, but not enough to realistically win it.