Complex sentence: Then FDR appointed Virginia's other Senator, Claude Swanson, Secretary of the Navy, and after Congress concurred in that post, Governor Pollard quickly appointed Byrd to the vacant U.S. Senate seat.
Split into simpler sentences: Then FDR appointed Virginia's other Senator, Claude Swanson, Secretary of the Navy. After Congress concurred in that post, Governor Pollard quickly appointed Byrd to the vacant U.S. Senate seat.