Joe Kennedy to endorse Warren during campaign announcement

Rep. Joe KennedyJoseph (Joe) Patrick KennedyOvernight Defense: Transgender troops rally as ban nears | Trump may call more troops to border | National Guard expects 3M training shortfall from border deployment | Pentagon to find housing for 5,000 migrant children Transgender troops rally as Pentagon prepares to implement ban The Hill's Morning Report — Presented by Pass USMCA Coalition — Trump rallies for second term on 'promises kept' MORE III (D-Mass.) is set to endorse Sen. Elizabeth WarrenElizabeth Ann WarrenThe Hill's Morning Report — Mueller aftermath: What will House Dems do now? Warren spends big on staff in high-stakes 2020 gamble On The Money: Inside the Mueller report | Cain undeterred in push for Fed seat | Analysis finds modest boost to economy from new NAFTA | White House says deal will give auto sector B boost 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) MenendezWe can accelerate a cure for Alzheimer's The Hill's 12:30 Report: Manafort sentenced to total of 7.5 years in prison Acting Defense chief calls Graham an 'ally' after tense exchange MORE (D-N.J.) endorsed Sen. Cory BookerCory Anthony BookerButtigieg says he wouldn't be opposed to having Phish play at his inauguration Sanders announces first endorsements in South Carolina Buttigieg to fundraise in DC with major Obama, Clinton bundlers next month: report MORE (D-N.J.) last week after he threw his name into the primary contest.

And Sen. Kamala HarrisKamala Devi HarrisFive former Obama ambassadors back Buttigieg Harris: Integrity of US justice system 'took a real blow' with Barr's actions Sanders announces first endorsements in South Carolina MORE (D-Calif.), who announced her candidacy last month, has already secured endorsements from California lawmakers, including Reps. Ted LieuTed W. LieuDems push back on White House suggesting they're 'not smart enough' for Trump's tax returns Civil rights attorney confronts Candace Owens on Fox News Lieu fires back at GOP lawmaker who claims he was 'owned' by Candace Owens: 'She said what she said' MORE (D) and Katie HillKatherine (Katie) Lauren HillFreshman House Dems surge past GOP in money race Dems offer bill directing IRS to create free online tax filing service Liberals surprised by tax vote vow to kill 'Free File' provision 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.