Senate Majority Leader Harry ReidHarry Mason ReidDems search for winning playbook Dems face hard choice for State of the Union response The Memo: Immigration battle tests activists’ muscle MORE (D-Nev.) endorsed Sen. Kirsten GillibrandKirsten Elizabeth GillibrandTrump thinks he could easily beat Sanders in 2020 match-up: report Listen: EMILY’s List upbeat about Dem House in '19 Desperate Democrats shouldn't settle for Oprah MORE (D-N.Y.) on Friday, giving her first reelection bid a boost as she heads toward a primary with Rep. Carolyn Maloney (D).

In a statement, Reid called Gillibrand a "rising star" in the Democratic caucus.

"As a working mother with two young children, Kirsten brings unique perspective to the challenging issues we are debating in Congress," Reid said. "In just six months, Kirsten has introduced a number of new and innovative legislative approaches to the problems many families face."

Reid's endorsement comes as Gillibrand blew Maloney away in fundraising for the second quarter. Recent polling, though, shows Maloney holding a slight lead over Gillibrand in the primary.