Senate Majority Leader Harry ReidHarry Mason ReidAmendments fuel resentments within Senate GOP Donald Trump is delivering on his promises and voters are noticing Danny Tarkanian wins Nevada GOP congressional primary MORE (D-Nev.) endorsed Sen. Kirsten GillibrandKirsten Elizabeth GillibrandSenate moving ahead with border bill, despite Trump Dem presidential hopefuls seize on Trump border policy Actress Marcia Gay Harden urges Congress to boost Alzheimer's funding 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.