Trump-backed challenger Anthony Constantino just toppled the GOP establishment in New York’s 21st District, and that sends a loud message to party bosses.[1][2]
Quick Take
- CBS News projected Constantino to defeat state Assemblymember Robert Smullen in the Republican primary.[1]
- Smullen had the backing of the state Republican Party and local GOP officials.[1][2]
- Constantino won Trump’s endorsement and built his campaign around loyalty, self-funding, and conservative themes.[1][3]
- The race became a test of Trump’s influence against the old party structure.[2][3]
Trump’s Pick Beats the Party Machine
Anthony Constantino, a Trump-backed businessman and first-time candidate, defeated Robert Smullen in the Republican primary to replace Representative Elise Stefanik, according to CBS News projections.[1]
The result marked a clear win for a candidate who ran as an outsider and made his support for President Donald Trump the center of his campaign.
Constantino’s victory also undercut the local GOP structure that lined up behind Smullen. CBS News reported that Smullen had support from the state Republican Party and other local officials, but it was not enough to stop Constantino’s surge.[1][2]
Syracuse.com reported that Constantino led by 18 points with most precincts reporting, showing a strong margin rather than a narrow upset.[2]
A Campaign Built on Trump Loyalty
Constantino built his case around public loyalty to Trump and a sharp break from party caution. CBS News noted that Trump endorsed him after Constantino displayed a large “Vote for Trump” sign at his company headquarters after the 2024 assassination attempt in Butler, Pennsylvania.[1] Politico also reported that Trump praised Constantino’s support and tied the endorsement to that sign.[3]
Trump’s preferred candidate wins primary to succeed Elise Stefanik https://t.co/S12jEgRdfS
— POLITICO (@politico) June 24, 2026
That message fit a wider pattern in today’s Republican Party, where Trump’s endorsement still carries real weight. Constantino also drew attention for self-funding his run and promising to donate his congressional salary to charity, according to campaign materials and earlier reporting.[4][6]
For many voters, that looked less like politics as usual and more like a direct challenge to the donor class and the old guard.
Smullen’s Backing Was Strong, but Not Strong Enough
Smullen entered the race with deep institutional support. CBS News said he had the state party behind him and backing from local GOP officials.[1]
Earlier coverage also described him as the preferred choice of the New York State Republican Party, with endorsements from county leaders and other party figures.[2][5] That support gave him the look of the safer, more traditional choice.
Since I know this district and these numbers like the back of my hand…as @Redistrict says “I’ve seen enough”
—
Congratulations to @constantino on his overwhelming victory in today’s #NY21 Republican primary!
This was a hard fought election and the voters have spoken loudly…
— Elise Stefanik (@EliseStefanik) June 24, 2026
But the race showed that party labels alone do not decide a Trump-era primary. Constantino framed himself as the candidate who would fight for Trump-style priorities, while Smullen represented the more established political path.[2][3]
The result suggests that in a district like NY-21, Republican voters can still reward a candidate who speaks more bluntly and openly to their frustrations with the party system.
What Comes Next in NY-21
Constantino now moves into the general election with momentum and a powerful story to tell. CBS News reported that he will face Democrat Blake Gendebien in November, with Stefanik leaving the seat open after years in Congress.[1][2]
The Republican win also gives Trump another data point for his influence inside the party, especially in a year when many voters remain angry about inflation, immigration, and government overreach.
The broader lesson is simple. Republican voters in this district chose the candidate most closely tied to Trump over the one most closely tied to the local party structure.[1][2]
For those who have watched party elites lose touch with their voters, that outcome will feel familiar, and for establishment Republicans, it should be a warning.
Sources:
[1] Web – Trump-backed challenger beats establishment GOP candidate in primary …
[2] Web – Republican Anthony Constantino leans into Trump support … – WAMC
[3] Web – The bitter NY-21 primary highlights a fractured GOP
[4] Web – CONSTANTINO, ANTHONY THOMAS – Candidate overview – FEC
[5] Web – The Totally Bonkers Race to Replace Elise Stefanik – POLITICO
[6] Web – New York 21st Congressional District Primary Election Results
