Trivia: Opposing parties of Congress compete each year in what sport?
The correct answer is Baseball
So why is this answer correct? : In 1909, the first Congressional Baseball Game was organized by Pennsylvania Representative John Tener, who spent time as a professional baseball player before being elected to Congress. The game was held intermittently until the mid-1940s, due to interruptions from the Great Depression and World War II, but has been played regularly every year since 1962.