The Massachusetts state campaign director for Sen. Bernie Sanders Bernie SandersTrump, Biden will not shake hands at first debate due to COVID-19 Sanders tells Maher 'there will be a number of plans' to remove Trump if he loses Sirota reacts to report of harassment, doxing by Harris supporters MORE's (I-Vt.) 2020 presidential bid has departed the campaign after accepting a position with Rep. Joe Kennedy Joseph (Joe) Patrick KennedyDemocrats see fundraising spike following Ginsburg death Massachusetts town clerk resigns after delays to primary vote count Bogeymen of the far left deserve a place in any Biden administration MORE's (D-Mass.) Senate campaign.

Joe Caiazzo left the Sanders campaign after previously serving as its director in New Hampshire, where the senator has been polling well ahead of the state's early primary, Politico first reported on Monday.

"Joe has been one of our first hires and was critical in building out our N.H. operation,” campaign manager Faiz Shakir said in a statement to Politico. “We wish Joe nothing but the best in his next endeavor and thank him for playing such a critical role in the beginning of this campaign. Bernie Sanders is going to win New Hampshire and a lot of that credit will go to Joe Caiazzo.”

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The campaign had placed Caiazzo in charge of its Massachusetts operations in September, stating at the time that Sanders was “not conceding Massachusetts to anyone,” including fellow top-tier contender Sen. Elizabeth Warren Elizabeth WarrenOvernight Defense: Appeals court revives House lawsuit against military funding for border wall | Dems push for limits on transferring military gear to police | Lawmakers ask for IG probe into Pentagon's use of COVID-19 funds On The Money: Half of states deplete funds for Trump's 0 unemployment expansion | EU appealing ruling in Apple tax case | House Democrats include more aid for airlines in coronavirus package Warren, Khanna request IG investigation into Pentagon's use of coronavirus funds MORE (D-Mass.).

Sanders's campaign did not immediately return a request for further comment from The Hill on Tuesday.

The Vermont senator has remained in the top tier of Democratic candidates throughout the primary so far, though both he and former Vice President Joe Biden Joe BidenBiden says voters should choose who nominates Supreme Court justice Trump, Biden will not shake hands at first debate due to COVID-19 Joe Biden should enact critical government reforms if he wins MORE trailed Warren in Massachusetts in an October survey.