Two former Obama campaign aides are joining the effort to support a potential 2016 Hillary Clinton Hillary Diane Rodham ClintonBarr criticizes DOJ in speech declaring all agency power 'is invested in the attorney general' Virginia Democrat blasts Trump's 'appalling' remark about COVID-19 deaths in 'blue states' The Hill's Campaign Report: Biden asks if public can trust vaccine from Trump ahead of Election Day | Oklahoma health officials raised red flags before Trump rally MORE presidential bid.

Mitch Stewart, who coordinated President Obama’s 2012 battleground state strategy, and Jeremy Bird, the Obama campaign’s national field director, have joined Ready for Hillary, the super-PAC formed at the beginning of the year to support a Clinton presidential run.

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"Ready for Hillary has sought out the most talented people in the business to harness the energy of everyday Hillary supporters and lay the groundwork for 2016," Ready for Hillary senior adviser Craig T. Smith said in a statement. "There is no one that better understands grassroots presidential politics than the team that won the last two presidential elections."

Stewart and Bird are the latest Obama loyalists to join Ready for Hillary. Last month, two top donors to the pro-Obama super-PAC Priorities USA, who combined to donate more than $5 million to Democrats in the last election, signed on as founding members of Ready for Hillary’s national finance council.

The former Obama teamers join a number of longtime Clinton allies in the Ready for Hillary effort, including Bill Clinton William (Bill) Jefferson ClintonD-Day for Trump: September 29 Trump job approval locked at 42 percent: Gallup If Trump doesn't know why he should be president again, how can voters? MORE’s former White House Political Director Craig Smith; former Rep. Ellen Tauscher (D-Calif.); Harold Ickes, a senior adviser on Hillary Clinton’s 2008 presidential run; former Michigan Gov. Jennifer Granholm (D); and EMILY's List founder Ellen Malcolm.

Last month, Sen. Claire McCaskill Claire Conner McCaskillDemocratic-linked group runs ads in Kansas GOP Senate primary Trump mocked for low attendance at rally Missouri county issues travel advisory for Lake of the Ozarks after Memorial Day parties MORE (D-Mo.) became the first sitting lawmaker to endorse the draft effort.

The group does not have any formal ties with Hillary Clinton, who has not said if she will run in 2016. Polls though show she is the frontrunner for the Democratic nomination.

This story was updated at 8:13 a.m.