I don't know what's more embarrassing: the fact that Democratic rising stars all got knocked out in 2010 and 2014, or the fact that GOP rising stars turn out to be complete jokes.
Which Democratic "rising stars" got knocked out? I don't recall having any.
We have yet to witness all the side effects of the 2010/2014. Sure, people like Gabbard and Harris are still around in their deep blue states. But in states that should be winnable for Democrats (Wisconsin, Michigan, Ohio, Pennsylvania) the state legislatures got wiped out and gerrymandering from 2010 means less Dems filtering up the ladder. This problem will be more apparent in the future.
Retreads like Feingold and Strickland, sure they're good candidates, but the fact that these are the best Dems can do in those states that should have a solid Dem bench is telling. Not to mention the lack of credible Dems in North Carolina or Pennsylvania.