The Hudson River cuts through New York’s 17th Congressional District, where protected parkland, drinking water reservoirs and environmental hazards are colliding with one of the nation’s most closely watched House campaigns. The district includes Putnam and Rockland counties and portions of Dutchess and Westchester.

Republican incumbent Mike Lawler faces Democratic nominee Cait Conley, a veteran and national security expert. Conley won the June 23 Democratic primary with 49.5% of the vote, defeating Rockland state legislator Beth Davidson, who received 31.8%.

The Cook Political Report lists the district among 18 House tossup races and one of only two with a Democratic lean. With Republicans holding a narrow 218 to 213 House majority, NY-17 represents one of the strongest Democratic pickup opportunities.

Lawler won a second term in 2024 with 52.1% of the vote. He was one of only three Republicans to capture a congressional district won by Democrat Kamala Harris during her unsuccessful presidential campaign.

Democrats also hold a registration advantage. As of February 2026, the district had 194,295 registered Democrats and 138,421 registered Republicans, with the gap widening since the 2024 election.

President Donald Trump’s net approval rating among New York voters stands at minus 30, according to polling by The Economist. Democrats hope that dissatisfaction will persuade moderate Republicans who previously backed Lawler to reconsider.

William Knox, a Dutchess County resident who supported Lawler in 2022 and 2024, said he would cross party lines for Conley. “He has consistently voted along lines that support the president’s agenda, rather than voting in ways that would support us, his constituents.”

The candidates have sparred over affordability, energy costs and data centers. Conley has tied higher gasoline and grocery prices to Lawler’s support for Trump’s war with Iran, while Lawler has blamed Albany Democrats and Gov. Kathy Hochul for utility costs associated with Indian Point’s closure and New York’s climate law.

Environmental pressures are visible across the district. Indian Point is undergoing a $2.3 billion decommissioning project, while a disputed plan to release roughly 45,000 gallons of radioactive wastewater during that process remains under appeal after receiving court approval.

Rockland County’s drinking water is contaminated by PFAS, while the Trump administration has moved to roll back limits on some of the chemicals. In Orangetown, residents have mobilized against a planned data center expansion because of concerns about noise, diesel backup generators and possible contamination of the nearby Lake Tappan Reservoir.

The town adopted a data center moratorium, but it does not apply to that project. Rockland, where Lawler lives, already has five data centers, making the industry a particularly sharp campaign flashpoint.

Lawler has highlighted more than $328,000 in payments from two AI surveillance companies disclosed in Conley’s financial filings. Conley has accused Lawler of helping make Rockland a data center hub while accepting campaign donations from major technology interests.

Conley has said data centers should benefit their host communities. “My policy on data centers has been very clear. If they’re going to be built, they need to be a net positive for the communities, not extorting the communities that they’re being built in,” she told CNN’s “State of the Union.”

Conley describes the climate crisis as a national security threat, drawing on her experience as director for counterterrorism on the National Security Council during the Biden administration. She supports restoring clean energy grant programs, preserving residential solar tax credits and modernizing the electric grid.

She also favors moving away from fossil fuels toward solar, geothermal and wind power. Conley has called for greater utility accountability, including public hearings and subpoenas for company records, while opposing efforts to reopen Indian Point.

Lawler’s voting record offers a stark contrast. The League of Conservation Voters gave him a 12% score for 2025 after he supported the environmental position on four of 33 votes, down from 18% in 2024 and 19% in 2023.

Still, Lawler tied U.S. Rep. Nick LaLota for the highest 2025 score among New York’s seven House Republicans. He supported clean air and water measures, helped sponsor the NJ-NY Watershed Protection Act in 2023 and backed New York’s $4.2 billion Environmental Bond Act.

Lawler has secured $35.9 million for 17 district projects, most involving environmental infrastructure such as water systems, PFAS treatment, stormwater management and dam rehabilitation. He also urged Republican leaders to retain clean energy tax credits before voting for the One Big Beautiful Bill Act, which rolled back many subsidies.

His campaign has received donations from oil, gas and utility interests, including $10,000 from Koch Inc., $5,000 from Edison International, $4,500 from Williams Cos. and $1,000 from Entergy. Conley participates in Unrig Washington, whose candidates reject corporate PAC money.

Neither campaign responded to requests for comment. The candidates are scheduled to debate Sept. 28 on News 12 and Oct. 14 on PIX11, giving voters another chance to demand specific answers about the district’s environmental future.