Earlier this week, the Koch-allied group American Encore released a poll of Minnesota that found Sen. Al Franken with a wan 40 percent approval rating. No credible candidate has jumped into the race against Franken, but the poll suggested to anyone looking that, hey, maybe, this is the year to go for it. Today, Harper Polling released a study of Oregon that found Gov. John Kitzhaber struggling against an opponent and Sen. Jeff Merkley up only 7 points on a conservative state legislator. If you've been paying attention, you may be reminded of the poll the NRSC commissioned after Colorado Rep. Cory Gardner thought he might run for Senate. The poll gave him a shot—he jumped in.