By Carmen FormanStaff writercforman@oklahoman.comThe Oklahoma Supreme Court on Tuesday heard two legal challenges to an initiative petition seeking to implement a redistricting process in Oklahoma that’s independent of the state Legislature. The challenges took issue with the description of the initiative petition and claimed the petition violates some Oklahomans’ First Amendment rights and breaks the state’s single-subject rule, which says initiative petitions may deal with only one main issue. An Oklahoma group called People Not Politicians wants the chance to circulate petitions asking Oklahoma voters to take redistricting power away from state lawmakers.