MADISON, Wis. – Frustrated by one federal court, conservative activists in the crosshairs of a partisan Wisconsin prosecutor say they’ll take their First Amendment case to the Supreme Court. Andrew Grossman, an attorney for veteran political activist Eric O’Keefe and the Wisconsin Club for Growth, said he hopes the high court will settle questions tied to political speech and Wisconsin’s politically charged John Doe investigation. The petition of certiorari, as it’s called, is due by Jan. 21. It’s been a long and winding road to the high court. U.S. District Court Judge Rudolph Randa had argued the conservatives showed that...