Just in case it isn't clear, I don't really care if Democratic primary candidates, or their surrogates, take potshots at each other. It's an election! It's politics!
What I do care about are a) Democrats who reinforce bogus right wing frames about Democrats generally and b) A lackey press weaned on doing the same. Add a little bit c) which is the tendency of the Beltway press to have a seizure about perceived blogger conflicts of interest while dutifully ignoring those of their favorite sources.