Complex sentence: After studying and practicing law in St. Augustine, David Levy became the delegate to United States Congress for the Florida Territory and was elected as a Democrat to the United States Senate when Florida was admitted to the Union in 1845.
Split into simpler sentences: After studying and practicing law in St. Augustine, David Levy became the delegate to United States Congress for the Florida Territory. He was elected as a Democrat to the United States Senate when Florida was admitted to the Union in 1845.