It really doesn't matter how incompetent the Democrats have become or how bad the image of the Democrat Party has become. As always happens, the American voters will have tired of the Republican regime and there will be a new Democrat administration, and, in all likelihood, the Dems will regain a slim majority in both the House and the Senate as well ... It's simply the pattern. Not to mention the fact that Republican blunders (mainly, a huge outbreak of criminal misconduct and indictments on the part of administration members and members of Congress), high gas prices, mishandling of the war (in terms of mishandling of the media, crappy spin, bad PR efforts and some some egregious mistakes by the military leadership in providing public information and/or badly attempted coverups of events) will render the American voters (the tiny minority of the populace which actually votes) ready for a change.
It doesn't look good at all right now.