Answer
In 2012, Beto O'Rourke defeated incumbent Silvestre Reyes to be elected to the U.S. House of Representatives. O'Rourke, a Democrat, was a former city councilman from El Paso, Texas, and Reyes, a Democrat, had been in Congress since 1993. The race was considered to be one of the most competitive in the country, and O'Rourke's victory was seen as a sign of the changing political landscape in Texas.