Complex sentence: In 2011, Clark sought the Democratic nomination to challenge Republican congressmen Chip Cravaack in Minnesota's 8th congressional district, but lost the endorsement to Rick Nolan, who went on to win the August 2012 primary.
Split into simpler sentences: In 2011, Clark sought the Democratic nomination to challenge Republican congressmen Chip Cravaack in Minnesota's 8th congressional district, but lost the endorsement to Rick Nolan. Nolan went on to win the August 2012 primary.