This is one thing (of many) that frustrates me about our current political setup. How does a registered Democrat who is unhappy with Obama legitimately voice their unhappiness in 2012 without wasting a vote? The only real choice today seems to be deregistering and switching parties, since Obama will likely be the primary candidate. Looking back a little, Carter faced some opposition during the primaries, with Ted Kennedy getting 34% of the vote. When was the last time the presidential office remained aligned to a specific party, while also seeing the incumbent president defeated in a reelection attempt?