A Jacksonville police officer has quit the force after admitting he told colleagues that he would volunteer to assassinate President Obama. The officer, Sam Koivisto, 57, told The Florida Times-Union on Wednesday that his comments had been blown out of proportion and that he had planned to retire in five months anyway. Mr. Koivisto retired earlier this month while facing an inquiry into his comments to other officers after the election. He told them that if an order came to kill Mr. Obama, he “wouldn’t mind being the guy.” He told the investigators his comments were hyperbole and not actual threats.