Margaret Vivian Goodlander (born November 4, 1986) is an American lawyer and politician who has served as the U.S. representative from New Hampshire's 2nd congressional district since 2025.

[9] Following Trump's acquittal by the U.S. Senate in February 2020, she began working as counsel to Co-Equal, an activist organization that advocates for increased congressional funding and support for federal agencies that provide research and policy advice to members of Congress.

She served as a deputy assistant attorney general overseeing the international, appellate, and policy work of the Justice Department's Antitrust Division from September 2022 to February 2024.

[12] After leaving the Justice Department, she briefly served as a White House senior advisor, where she led the Biden administration's Unity Agenda for the Nation.

[13] On May 9, 2024, Goodlander announced her candidacy in the Democratic primary for New Hampshire's 2nd congressional district in the 2024 elections to succeed retiring U.S. Representative Annie Kuster.

[16] In the general election, Goodlander defeated Republican nominee and libertarian activist Lily Tang Williams 52.9% to 47.1%.

[19] Goodlander is married to Jake Sullivan, who served as United States national security advisor under President Joe Biden from 2021 to 2025.

While awaiting a medical procedure to remove the fetus, Goodlander went into labor and gave birth to a stillborn son in a hotel bathtub on Easter.