Complex sentence: Cotton has stated his support for the repeal of the Patient Protection and Affordable Care Act, and has signed an amicus brief in support of Senator Ron Johnson's legal challenge against the U.S. Office of Personnel Management's ACA ruling.
Split into simpler sentences: Cotton has stated his support for the repeal of the Patient Protection and Affordable Care Act (ACA). Cotton signed an amicus curiae in support of Senator Ron Johnson's legal challenge against the U.S. Office of Personnel Management's ACA ruling.