Sen. Kamala Harris Kamala HarrisTexas Democratic official urges Biden to visit state: 'I thought he had his own plane' The Hill's Campaign Report: Biden on Trump: 'He'll leave' l GOP laywers brush off Trump's election remarks l Obama's endorsements A game theorist's advice to President Trump on filling the Supreme Court seat MORE (D-Calif.) acknowledged Tuesday on MSNBC's "Andrea Mitchell Reports" that she has to "earn the support" of black voters.

"Everyone has to earn the vote of every person," she told Mitchell.

"I have never and never would take for granted that because of my gender or my race, that people will naturally come to me." she added. "You have to earn the support."

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On attracting the African American vote, @KamalaHarris: "Everyone has to earn the vote of every person. I have never and never would take for granted that because of my gender or my race, that people will naturally come to me. You have to earn the support." #AMRstaff — Andrea Mitchell (@mitchellreports) November 26, 2019

Harris is one of three Black lawmakers in the Democratic primary race, with Sen. Cory Booker Cory Anthony BookerThe movement to reform animal agriculture has reached a tipping point Watchdog confirms State Dept. canceled award for journalist who criticized Trump 3 reasons why Biden is misreading the politics of court packing MORE (D-N.J.) and former Massachusetts Gov. Deval Patrick Deval PatrickRalph Gants, chief justice of Massachusetts supreme court, dies at 65 It's as if a Trump operative infiltrated the Democratic primary process Top Democratic super PACs team up to boost Biden MORE.

According to RealClearPolitic's average of polls, Harris is polling at 4 percent better than Booker and Patrick. However, Harris has struggled to gain traction with black voters around the country.

In a recent Economist/YouGoV national poll, 21 percent of black voters thought of Harris as "highly favorable," which was behind former Vice President Joe Biden Joe BidenFormer Pence aide: White House staffers discussed Trump refusing to leave office Progressive group buys domain name of Trump's No. 1 Supreme Court pick Bloomberg rolls out M ad buy to boost Biden in Florida MORE (35 percent) and Sens. 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.) (32 percent) and Bernie Sanders Bernie SandersSirota reacts to report of harassment, doxing by Harris supporters Republicans not immune to the malady that hobbled Democrats The Hill's Morning Report - Sponsored by Facebook - Republicans lawmakers rebuke Trump on election MORE (I-Vt.) (30 percent).

Forty-seven percent of black voters said Biden was their first choice and 12 percent said both Warren and Sanders. Only 4 percent said Harris.