LWV, the NAACP, and the Equal Justice Society filed an amicus brief supporting states challenging an executive order by President Trump purporting to abolish birthright citizenship. The brief, filed in the U.S. Court of Appeals for the Ninth Circuit, asserts the executive order was unconstitutional, outlines the historic oppression of Black Americans birthright citizenship addressed, highlights the disenfranchisement revoking it would create, and explains the racial animus behind the order.

League of Women Voters (LWV), League of Women Voters of Florida (LWVFL), and League of Women Voters of New York State (LWVNYS) moved to intervene as defendants in a federal lawsuit challenging how the decennial census counts people, and which seeks to add a citizenship question to the 2030 Census. The League intervened to protect the constitutional directive to use the whole population, regardless of citizenship status, in apportioning seats in Congress and the Electoral College, determining where federal funding goes, and ensuring the census captures an accurate count of the population.