Joe Kennedy to endorse Warren during campaign announcement

Rep. Joe KennedyJoseph (Joe) Patrick KennedyJoe Kennedy introduces resolution rejecting Trump’s transgender military ban Warren launches White House bid with call for 'structural change' Joe Kennedy to endorse Warren during campaign announcement MORE III (D-Mass.) is set to endorse Sen. Elizabeth WarrenElizabeth Ann WarrenWarren set to announce plan for universal child care: reports Barack, Michelle Obama expected to refrain from endorsing in 2020 Dem primary: report Booker seeks dialogue about race as he kicks off 2020 campaign MORE (D-Mass.) for president when she formally announces her candidacy on Saturday, according to a person familiar with the plans.

Kennedy will make the announcement in a speech introducing Warren at an event in Lawrence, Mass., where she is expected to officially kick off her campaign for the White House. The planned endorsement was first reported on Friday by The Boston Globe.

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A spokesperson for Warren's campaign did not immediately respond to The Hill's request for comment.

Kennedy, a rising star in the Democratic Party, will be among Warren's first high-profile endorsers. 

While most lawmakers have so far withheld their endorsements in the nascent 2020 Democratic presidential primary, a handful of politicians have offered candidates their support. 

Sen. Bob MenendezRobert (Bob) MenendezWilliam Barr is right man for the times This week: Trump delivers State of the Union amid wall fight BuzzFeed story has more to say about media than the president MORE (D-N.J.) endorsed Sen. Cory BookerCory Anthony BookerHarris, Booker call for judgement on Jussie Smollett case to be withheld until investigation is completed Barack, Michelle Obama expected to refrain from endorsing in 2020 Dem primary: report Jussie Smollett case shows media villainizing Trump and his supporters, without proof — again MORE (D-N.J.) last week after he threw his name into the primary contest.

And Sen. Kamala HarrisKamala Devi HarrisHarris, Booker call for judgement on Jussie Smollett case to be withheld until investigation is completed Harris calls idea of Trump trusting Putin over US intel ‘height of irresponsibility and shameful’ Barack, Michelle Obama expected to refrain from endorsing in 2020 Dem primary: report MORE (D-Calif.), who announced her candidacy last month, has already secured endorsements from California lawmakers, including Reps. Ted LieuTed W. LieuDem lawmakers to open probe into ‘complex web of relationships’ between NRA, Russia Kamala Harris shopping trip stirs Twitter campaign trail debate Newsom endorses Kamala Harris for president MORE (D) and Katie HillKatherine (Katie) Lauren HillNewsom endorses Kamala Harris for president Hispanic civil rights icon endorses Harris for president Joe Kennedy to endorse Warren during campaign announcement MORE (D). 

Kennedy's endorsement could give Warren a boost as she seeks to move beyond the controversy surrounding her past claims of Native American ancestry. 

Criticism of those claims was renewed this week after The Washington Post published a copy of Warren's 1986 registration card for the State Bar of Texas in which she identifies herself as "American Indian."

Updated at 1:38 p.m.