Robert Anacletus Underwood is an American politician and educator who served as the delegate from Guam to the United States House of Representatives from 1993 to 2003 as a member of the Democratic Party. He subsequently served as the president of the University of Guam from 2008 to 2018 and is currently a co-chair of the United States Institute of Peace China-Freely Associated States Senior Study Group.

The Democratic Party of Guam is a political party in Guam affiliated with the U.S. Democratic Party. Its origins lie in the Popular Party, which was the only political party on Guam until 1956.