Senate Majority Leader Harry ReidHarry ReidHopes rise for law to expand access to experimental drugs If Gorsuch pick leads to 'crisis,' Dems should look in mirror first Senate confirms Mulvaney to be Trump’s budget chief MORE (D-Nev.) endorsed Sen. Kirsten GillibrandKirsten GillibrandSanders, not Trump, is the real working-class hero Dem senator predicts Gorsuch will be confirmed A guide to the committees: Senate 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.