An Illinois law that excludes “new” political parties from the ballot unless they run a full slate of candidates violates the First Amendment, a federal appeals court has held.The 7th U.S. Circuit Court of Appeals on Friday held the Illinois Election Code’s full-slate requirement for parties that are not yet established severely burdens the right to engage in political activity.“The core of the fundamental right to political association is the right to band together in a political party to advance a …