Thomas Stewart Udall (born May 18, 1948) is an American politician serving as the senior United States Senator from New Mexico, a seat he was first elected to in 2008. A member of the Democratic Party, he previously served as the U.S. Representative for New Mexico's 3rd congressional district from 1999 to 2009 and was the Attorney General of New Mexico from 1991 to 1999. A member of the Udall family, he is the son of Stewart Udall, the nephew of Mo Udall, and the cousin of Mark Udall. He is the dean of New Mexico's congressional delegation.
On March 25, 2019, Udall announced that he would not seek a third term in the 2020 election, making him the first Democratic senator to announce his retirement in that election cycle.
Udall has a "C-" rating from the National Rifle Association and a "F" rating from the Gun Owners of America for his support of gun control.
In 2013, he voted for state-by-state reciprocity of concealed carry and for the names of gun owners to be protected and released only in select situations.
In 2016, within weeks of the Orlando nightclub shooting, Udall participated in a sit-in at the House to demand votes on gun control legislation, saying, "We owe it to the LGBT community & all families harmed by gun violence to keep terror suspects fr[om] obtaining guns."
Since he was first elected to Congress in 1998, Udall has taken a leadership role on a wide array of environmental issues, receiving a lifetime score of 96% from the League of Conservation Voters. He was one of the original co-sponsors of the Arctic Wilderness Bill, and more recently has worked closely with the Navajo and Pueblo nations in New Mexico to oppose new leasing, drilling and fracking near Chaco Canyon National Park. In 2018 Udall received the Sierra Club's top award for public officials, the Edgar Wayburn Award.
In September 2019 Udall was one of eight senators to sign a bipartisan letter to congressional leadership requesting full and lasting funding of the Land and Water Conservation Act in order to aid national parks and public lands, benefit the $887 billion American outdoor recreation economy, and "ensure much-needed investment in our public lands and continuity for the state, tribal, and non-federal partners who depend on them."