Which states did James Shields represent as a Senator?

James Shields served as a U.S. Senator representing three states: Illinois, Minnesota, and Missouri. This unique distinction in his political career is notable because he is one of the few individuals to have represented multiple states in the Senate, reflecting his adaptability and the shifting political landscapes of his time.

Shields’ tenure included significant contributions during key historical moments, such as the Civil War era, which shaped his states' experiences and policies. His representation of Illinois and Minnesota illustrates his progressive political journey as he navigated various challenges and responsibilities in different political environments.

The other states listed in the options do not align with Shields’ terms in the Senate, which solidifies the correctness of choosing Illinois, Minnesota, and Missouri as his represented states.