A former legislative candidate is asking the Kansas Supreme Court to force a grand jury investigation of Secretary of State Kris Kobach. Steven X. Davis, a Lawrence Democrat, said Tuesday that he has asked the state’s highest court to require that the Douglas County District Court summon a grand jury. Davis said in a statement that the jury needs to investigate Kobach because of rumors that his office intentionally suppressed voter registration. Davis does say that his evidence is slim. By law, people in Kansas can call for a grand jury investigation by gathering a specific number of signatures. Six states, including Kansas, let citizens petition for a grand jury. Davis said he successfully gathered the signatures and submitted them in late July.