“I count the past year as one of the most rewarding in a career of public service. Unfortunately I am withdrawing from the campaign today.” Obama aside, last night’s results have spurred two very worthwhile Democratic candidates to close up shop: Chris Dodd and Joe Biden. Of course, this is by no means the end for these two…They have some serious work cut out for them in the Senate these days. (As for Bill Richardson, he says his 2% finish in Iowa puts him in “the Final Four,” and he plans to stay in for now. Well, given his low numbers in Nevada and elsewhere, he’s not exactly George Mason.)