David Breen Seymour is a New Zealand politician who has served as the 21st deputy prime minister of New Zealand since 2025 and as the 1st minister for regulation since 2023. A member of the ACT Party, he has served as its leader and Member of Parliament (MP) for Epsom since 2014. Typically classified as a right-libertarian involved with right-wing populism, Seymour is associated with liberal views on freedom of choice and economic policy, and conversely with majoritarian and reactionary views on New Zealand civic nationalism and Māori politics.