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Democratic presidential nominee Hillary Clinton delivers a videotaped address at the Democratic National Committee winter meeting last month in Atlanta. Erik S. Lesser / EPA

Obama and both Hillary and Bill Clinton were closely watching the DNC's recent elections. Former Vice President Joe Biden and top Obama aides like Valerie Jarrett worked the phones for Perez, whom the former president personally lobbied to enter the race. And other DNC candidates sought the blessing of the Clintons for their bids.

Obama has thrown his weight behind a major campaign on congressional redistricting, run by his former attorney general Eric Holder. And he can ultimately decide the fate of Organizing for Action, the group that grew out of his presidential campaigns. OFA recently relaunched to criticism from many Democrats, who say it undercut the official party.

Bill Clinton, meanwhile, has been an active campaigner for down-ballot Democrats, and he is known to wield his celebrity and fundraising prowess to snub Democrats who have crossed him or his wife.

"Keep fighting," Hillary Clinton said in a recent video message to Democrats. "I'll be right there with you every step of the way."

See more here:
Five New Power Centers: A Guide to the Fractured Democrats - NBCNews.com