David Bremner Henderson, a ten-term Republican congressman from Dubuque, Iowa, was the speaker of the United States House of Representatives from 1899 to 1903. He was the first congressman from west of the Mississippi River, the last Civil War veteran, the second foreign-born person, and the only Iowan to serve as Speaker.

Dubuque is a city in and the county seat of Dubuque County, Iowa, United States, located along the Mississippi River. At the time of the 2020 census, the population of Dubuque was 59,667. The city lies at the junction of Iowa, Illinois, and Wisconsin, a region locally known as the Tri-State Area. It serves as the main commercial, industrial, educational, and cultural center for the area. Geographically, it is part of the Driftless Area, a portion of North America that escaped all three phases of the Wisconsin Glaciation.