Dems 46%
Repubs 28%
A whopping 18% difference in oversampling. And even at that bogus number the internals are bad for zero.
Even more stilted. see page 21 and 22 for the sample size:
http://www.ap-gfkpoll.com/pdf/AP-GfK_Poll_Topline_April_2009.pdf
28% Republican was 9% heavy Republican + 9% moderate + 9% indep - lean Republican (note ~9 +~9 +~9 = 28).
46% Democrat was 16% heavy Democrat, 20% moderate, 10% indep - lean Democrat.
Biased sample to say the least.
7% "Indep - Don't lean"
19% "Don't know" (note, this is DIFFERENT than "other party" of which there was no significant declaration, Libertarians will tell you they are Libertarians. Communists and Democrats will lie about party affiliation)