Progressive Rep. Alexandria Ocasio-CortezAlexandria Ocasio-CortezAttorney says 75-year-old man shoved by Buffalo police suffered brain injury How language is bringing down Donald Trump Highest-circulation Kentucky newspaper endorses Charles Booker in Senate race MORE (D-N.Y.) reacted to former Vice President Joe BidenJoe BidenHillicon Valley: Biden calls on Facebook to change political speech rules | Dems demand hearings after Georgia election chaos | Microsoft stops selling facial recognition tech to police Trump finalizing executive order calling on police to use ‘force with compassion’ The Hill’s Campaign Report: Biden campaign goes on offensive against Facebook MORE’s primary wins on Tuesday, telling supporters it was “a tough night” for Sen. Bernie SandersBernie SandersThe Hill’s 12:30 Report: Milley apologizes for church photo-op Harris grapples with defund the police movement amid veep talk Biden courts younger voters — who have been a weakness MORE’s (I-Vt.) supporters.

“There’s no sugarcoating it. Tonight is a tough night,” Ocasio-Cortez, who is one of Sanders’s most high-profile supporters, said in an Instagram Live video.

“Tonight is a tough night electorally,” she added before citing the generational gap in support between Sanders and Biden. “Older voters, which we know are more reliable voters, which we know turn out, have decisively gone to former Vice President Biden.”

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“There’s a generational divide within the Democratic Party on health care, on climate change, on foreign policy, pretty much every policy imaginable,” she said. “As a younger person in this movement, I take a lot of that as information for how we navigate the next decade.

Ocasio-Cortez congratulated Biden on his victories, saying, “If you win a race, you win a race.”

Biden scored decisive primary victories on Tuesday, shoring up support in Michigan, Missouri and Mississippi, adding to a growing list of wins across the country.

The former vice president appeared to strike a unifying tone in an address on Tuesday and reached out to Sanders’s supporters.

“I want to thank Bernie Sanders and his supporters for their tireless energy and their passion,” Biden said in Philadelphia. “We share a common goal, and together we’ll defeat Donald TrumpDonald John TrumpSenate advances public lands bill in late-night vote Warren, Democrats urge Trump to back down from veto threat over changing Confederate-named bases Esper orders ‘After Action Review’ of National Guard’s role in protests MORE.”