Duncan is so right.
Look, it's simple. Every time the Democrats do anything Republicans run to reporters and say how wonderful this is and how it means the downfall of the Democratic party and blah blah blah. Hell, when Dick Cheney shot a man in the face they were claiming it'd be good for poll numbers. The press always believes it, and too often, Democrats do too.
If Lamont had lost, then the Republicans would have had a new talking point to give to the stenographers. Just pick your own. It doesn't matter. Then check out Chuck Todd's column.