Schundler not taking a back seat HERB JACKSON He's ba-ack. Well-rested after a long vacation to put that Nov. 6 unpleasantness behind him, Republican Bret Schundler is popping up at political events again, claiming to be the state GOP's "titular head" because of his primary victory last June and making no secret of his expectation to win the 2005 gubernatorial nomination as well. But does the GOP still want Schundler? History suggests that candidates who lost as badly as he did - Governor McGreevey garnered 56 percent to Schundler's 42 percent - usually slink off the political stage into oblivion....