New Hampshire Gov. Maggie Hassan Margaret (Maggie) HassanCongress needs to prioritize government digital service delivery Senate Democrats demand answers on migrant child trafficking during pandemic Hillicon Valley: Feds warn hackers targeting critical infrastructure | Twitter exploring subscription service | Bill would give DHS cyber agency subpoena power MORE (D) is endorsing Hillary Clinton Hillary Diane Rodham ClintonJoe Biden looks to expand election battleground into Trump country Biden leads Trump by 12 points among Catholic voters: poll The Hill's Campaign Report: Biden goes on offense MORE for president, The Associated Press reported on Thursday.

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The governor will make the announcement in Durham, N.H., on Friday during a Clinton campaign stop at the University of New Hampshire.

Hassan has lauded Clinton for her plan to make college more affordable, calling her the leader “that New Hampshire families need fighting for them.”

The Democratic governor is reportedly mulling a Senate run and has yet to announce whether she will seek a third term in office.

“ I will continue to stay focused on New Hampshire, but I also understand that at some point I need to make decisions about 2016, and that needs to be sooner rather than later," she told the Concord Monitor.

Hassan and Clinton campaigned in New Hampshire last year for Sen. Jeanne Shaheen Cynthia (Jeanne) Jeanne ShaheenSenate Democrats introduce bill to sanction Russians over Taliban bounties Trump-backed candidate wins NH GOP Senate primary to take on Shaheen Democratic senator urges Trump to respond to Russian aggression MORE's reelection campaign. Shaheen endorsed Clinton in early September.

Hassan's endorsement comes as Clinton is hemorrhaging support in the Granite State.

The former secretary of State trails Sen. Bernie Sanders Bernie SandersJacobin editor: Primarying Schumer would force him to fight Trump's SCOTUS nominee Trump campaign plays up Biden's skills ahead of Cleveland debate: 'He's actually quite good' Young voters backing Biden by 2:1 margin: poll MORE (I-Vt.) in the state 43 percent to 32 percent, according to a RealClearPolitics average of polls.

Clinton and Sanders will both attend the New Hampshire Democratic Party State Convention on Saturday.