Lighthiser v. Trump is an environmental and climate change-related lawsuit that was filed in U.S. district court by Our Children's Trust on behalf of 22 youth plaintiffs, seeking revocation of certain executive orders of U.S. President Trump that favored fossil fuels over renewable energy and climate science. [1] [2]
On December 18, 2024, Montana's Supreme Court upheld a county court ruling in favor of youth plaintiffs in Held v. Montana . [3] Interpreting the Montana state constitution, the Held court ruled that a certain Montana law "violates Youth Plaintiffs' right to a clean and healthful environment and is unconstitutional on its face". [4] On May 29, 2025, Lighthiser was filed in the federal district court in Butte, Montana, 68 miles (109 km) from the Held venue in Helena. [1] The 22 Lighthiser plaintiffs, ages 7–25, included ten plaintiffs from the Held suit. [1]
The Lighthiser complaint named as defendants, President Donald Trump, several cabinet secretaries [1] and numerous executive agencies, [5] saying they are engaging in unlawful executive overreach. [2] The plaintiffs argued that three of Trump's orders "amount to a wholesale attack on clean renewable energy and climate science—escalating the climate emergency" and violating their Fifth Amendment right to life and liberty. [1] [Note 1] Specifically, plaintiffs refer to Trump's executive orders declaring "a national energy emergency", boosting production of "American energy", and reinvigorating "America’s beautiful, clean coal industry". [1]
The complaint argues that Trump acted beyond his legally granted powers (ultra vires) to "unleash" fossil fuel pollution and "debilitate" the Environmental Protection Agency, to "terminate" the Congressionally mandated National Climate Assessment, "dismantling, suppressing and scrubbing" science on government websites, and violating the state-created danger [Note 2] doctrine. [5] :pp. ii and 95-118. Unlike Juliana v. United States which tried unsuccessfully to force the government to change the country's energy system, the Lighthiser plantiffs merely seek revocation of Trump's executive orders. [1] [Note 3]
A May 29, 2025 Trump administration communication asserted that "the American people are more concerned with the future generations' economic and national security" and that "future generations should not have to foot the bill for the left's radical climate agenda". [6]