Complex sentence: Dewhurst's leadership on redistricting brought him into legal conflict with his former land commissioner opponent, Richard Raymond, the only elected official to have been a plaintiff in the 2006 U.S. Supreme Court review of the constitutionality of the redistricting plan.
Split into simpler sentences: Dewhurst's leadership on redistricting brought him into legal conflict with his former land commissioner opponent, Raymond. Raymond is the only elected official to be a plaintiff in the 2006 U.S. Supreme Court review of the constitutionality of the redistricting plan.