Christopher Thomas Sununu ( sə-NOO-noo; born November 5, 1974) is an American politician and engineer who has served since 2017 as the 82nd governor of New Hampshire. A member of the Republican Party, Sununu was on the New Hampshire Executive Council from 2011 to 2017. Sununu earned a bachelor's degree in civil and environmental engineering from the Massachusetts Institute of Technology. He has been chief executive officer of the Waterville Valley Resort in New Hampshire. Sununu is a son of former New Hampshire governor and White House Chief of Staff John H. Sununu, and a younger brother of former U.S. representative and senator John E. Sununu. Every member of the family has served as a Republican. Sununu's 2021 budget proposal included phasing out New Hampshire's only state income tax—on dividends and interest income (which Sununu states unfairly targets senior citizens more likely to be living off those types of income); slightly reducing selected other taxes; and instituting targeted student loan relief for those entering the healthcare, biotechnology, and social work fields.In January 2021, Sununu began his third term as governor of New Hampshire. In November 2021, amid speculation that he would run in the 2022 United States Senate election in New Hampshire, he announced that he would instead seek a fourth term as governor in 2022, which he won. This made Sununu the second modern governor of New Hampshire to serve four terms, after John Lynch.On July 19, 2023, Sununu announced that he would not run for a fifth term.