Why was Trump able to flip Nassau County to Republican?

In the 2024 presidential election, Nassau County was flipped red for the first time in more than two decades. Winning by a 4% margin, or nearly 30,000 votes, Republican Donald Trump defeated Democrat Kamala Harris after visiting only months before, and has been the first GOP candidate to win Nassau since George H.W Bush in 1988. 

Trump also won Suffolk County by an 11% margin, or roughly 80,000 votes — the biggest win he’s seen in the county since he’s won it in the last three elections. Although there have been instances of outliers, Long Island’s votes have remained relatively split between candidates throughout the last several presidential elections. And like many other moderate suburbs around the country, the red shift across these areas nationally during the 2024 election doesn’t come as a shock to some.