I'm looking at the internals, the poll doesn't look to be biased toward Democrats, Obama has 55% disapproval, the electorate is 4% less Democratic than 2008 and 45% Republican. It's about the favorables, Hulbard is not known by almost half of those polled and Quayle is disapproved of by 52%.
I don't mean in the crosstabs, i mean in general. Obama got 42% of the Vote here in 2008, so a 38% approval rating for him is actually really good. The McCain numbers are also really low, considering he won the district with 57% of the vote in 2008.
An interesting bit in the poll though is that AZ-3 Hispanics oppose the immigration law by only 5 points. Granted the Hispanics here aren't as Liberal as those in AZ-4 in South Phoenix, but those kinds of numbers suggest that Obama's attempt to use immigration to turnout Hispanic voters might not have been the best idea.