This has manifested in the polarizing of both parties, but in particular, the Republicans have moved to the right. As McCarty explains, “…partisanship and voting are increasingly tied to income with income levels enjoying economic growth becoming more Republican while low income voters have remained Democrats.” (McCarty, p. 7)
Ito ay ipinahayag sa polarizing ng parehong partido, ngunit sa partikular, ang Republicans lumipat sa kanan. Tulad ng paliwanag ni McCarty, "... pagkapartisano at pagboto ay increasingly nakatali sa kita na may mga antas ng kita tinatangkilik ang pang-ekonomiyang pag-unlad nagiging mas Republican habang botante mababa ang kinikita ay nanatiling Democrats." (McCarty, p. 7)