Sen. Kamala HarrisKamala Devi HarrisRand Paul introduces bill to end no-knock warrants The Hill’s Campaign Report: Biden campaign goes on offensive against Facebook McEnany says Juneteenth is a very ‘meaningful’ day to Trump MORE (D-Calif.) is using former Attorney General Jeff SessionsJefferson (Jeff) Beauregard SessionsMcCabe, Rosenstein spar over Russia probe Rosenstein takes fire from Republicans in heated testimony Rosenstein defends Mueller appointment, role on surveillance warrants MORE’s expected Senate run to help fuel her sputtering bid for the White House.

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Harris, who in a recent Iowa poll had just 4 percent support, sent a campaign email to voters Wednesday night asking for donations that would be split between her presidential campaign and Sen. Doug Jones’s (D-Ala.) campaign.

Jones won the seat formerly held by Sessions in a 2017 special election against Republican Roy MooreRoy Stewart MooreSessions goes after Tuberville’s coaching record in challenging him to debate The 10 Senate seats most likely to flip Sessions fires back at Trump over recusal: ‘I did my duty & you’re damn fortunate I did” MORE.ADVERTISEMENT

Harris called Sessions the “extremist architect” of some of the Trump administration’s “most damaging actions,” and noted her role as a member of the Judiciary Committee in pushing back on Sessions’s confirmation. 

“I fought Jeff Sessions every step of the way, voting against his nomination for Attorney General and calling for his resignation when it became clear he lied under oath to protect the President,” Harris wrote to supporters. 

“And now that Mitch McConnellAddison (Mitch) Mitchell McConnellSenate advances public lands bill in late-night vote GOP senator to try to reverse requirement that Pentagon remove Confederate names from bases No, ‘blue states’ do not bail out ‘red states’ MORE has recruited him to run for Senate in Alabama, I need your help in this fight to make sure he never returns to power,” she added. 

Sessions is expected to announce plans to run for his former Senate seat on Thursday, multiple sources told The Hill. The deadline to file for the Senate race is Friday. 

Several Republicans are already running for the seat, but Sessions has remained popular in Alabama despite his tense relationship with Trump. The primary is slated for March 3. 

Sessions would have about $2.5 million cash on hand as a candidate, according to campaign finance reports.