San Diego Judge Gary Kreep, a conservative legal activist who led a failed fight to challenge President Obama’s citizenship, has been exiled to traffic court after several Superior Court rulings favoring defendants’ constitutional rights. Kreep, 63, was reassigned on Sept. 9 from the downtown San Diego courthouse to a Kearny Mesa facility that handles traffic offenses and small claims. The move came after prosecutors from the City Attorney’s Office began to boycott his courtroom over his legal approach. For instance, Kreep often declined to take away a defendant’s 4th Amendment rights against search and seizure — something prosecutors can legally...