Edited by Karina Koppikar, Emma Hartman, Rishi Chandra, Amelia Cantwell, & Owen Andrews
“Will you commit to ending finsta?” Sen. Richard Blumenthal asked a Facebook executive in 2021, mistakenly treating ‘finsta’—slang for a secondary, often private Instagram account—as an official feature the company could shut down. The moment captured a familiar criticism of an aging Congress: its members are out of touch with the people they govern. In the 2026 Democratic primaries, younger challengers defeated some longtime incumbents but lost to others. Why did generational change successfully persuade voters in some races and fail in others?
The 2026 primary season was particularly rough for Democratic incumbents, with seven ultimately being defeated, tying 2012 for the most this century. Redistricting forced two Texas Democrats into separate primaries against fellow incumbents, and an unpopular New York incumbent lost to a similarly aged challenger. The other four losses were more directly tied to generational change, with the four ousted representatives—Michigan's Shri Thanedar, Colorado's Diana DeGette, Connecticut’s John Larson, and New York's Adriano Espaillat—averaging around 73 years of age while their challengers averaged around 36. Three of those challengers also ran on a more left-leaning platform than their incumbent counterparts. These defeats have sparked a wave of analyses questioning their causes, with some researchers theorizing that while age helped make longtime incumbents vulnerable, simply being younger was rarely enough to beat them.
Some candidates offered a different case for change. In Connecticut, former Hartford Mayor Luke Bronin, 47, made age the focal point of his campaign. Bronin argued that Rep. Larson, 78, had become an embodiment of the status quo after 14 terms and that change was long overdue. Larson has long been a major advocate for Social Security, introducing various bills to increase benefits and strengthen Social Security’s finances. But he made headlines last year for a different reason—freezing up on the House floor during a speech, an occurrence later attributed to a partial seizure. Rather than emphasize ideological differences, the more moderate Bronin framed the election around Larson’s effectiveness after 14 terms and the need for new leadership. The seizure brought attention to Larson’s health, but Bronin’s rhetoric furthered the idea that he could no longer serve effectively.
The other three races featured clearer ideological contrasts: Reps. DeGette, Thanedar, and Espaillat were all establishment-backed incumbents challenged by further-left-leaning candidates. In Michigan, State Rep. Donavan McKinney, 34, ran on a progressive platform that included Medicare for All and anti-corporate policies, emphasizing his Detroit roots while painting Thanedar, 71, as ineffective.
In Colorado, Rep. DeGette, 69, lost to PhD student Melat Kiros, 29, despite DeGette’s reputation as a more progressive member of the Democratic caucus. Kiros pushed for a complete ban on weapons sales to Israel, giving voters a policy difference alongside a case for generational change after DeGette’s nearly 30 years in Congress.
In the case of Rep. Espaillat, 72, Democratic Socialists of America (DSA)-endorsed Darializa Avila Chevalier, 32, attacked the incumbent’s acceptance of donations backed by the American Israel Public Affairs Committee (AIPAC).
Despite this onslaught against older incumbents, some not only survived but prevailed with ease. The most notable example comes from the Massachusetts Senate primary, in which two-term incumbent Sen. Ed Markey, 80, easily fended off Boston-area Rep. Seth Moulton, 47. Despite Markey’s nearly 50 years in Congress, the moderate Moulton failed to overcome his opponent’s progressive appeal. Markey touted his role in the Green New Deal and his support for Medicare for All. Some pointed to Moulton’s controversial comments about transgender athletes as a factor in his loss, while other analyses attributed it to his inability to successfully characterize Markey as the out-of-touch candidate. Whatever weight those factors carried, Markey’s win suggests that a long tenure does not make an incumbent vulnerable when voters still see them as representing the change they want.
There’s no doubt the party faces a debate over its direction. The rise of DSA-backed challengers is part of that story, but these primaries also show that age becomes a liability when voters see another, more crucial reason to demand something different. A younger face may win voters’ initial attention, but a convincing case for what changes they will enact may matter more at the polls.
If this year’s push for new blood is indicative of what’s to come, future challengers can take steps to improve their chances of success. Bronin’s case may be a unique outlier: Larson’s seizure during a House speech shone a direct spotlight on his effectiveness. In the other three races, however, challengers also drew clear policy contrasts with the incumbents. For younger challengers, the task is to turn an appeal for generational change into a concrete argument for better representation. Naming a specific district need or policy disagreement shows voters what younger leadership would deliver—and why it would be preferable to the incumbent’s experience.
Taken together, these races suggest that age gave challengers an opening, but it did not close the deal. McKinney, Kiros, and Avila Chevalier offered voters a different policy direction, while Bronin questioned Larson’s political effectiveness. In contrast, Moulton struggled to make that same case against Markey, whose progressive record remained an asset. The question for voters is not simply who is younger, but what they will gain by replacing the incumbent.