Capitol Hill police are expected to seek an arrest warrant next week for Rep. Cynthia McKinney of Georgia, who was involved in a physical confrontation with a Capitol police officer Wednesday, police and legal authorities said Thursday. Officially, the investigation of the incident, in which the DeKalb County Democrat allegedly struck a police officer who tried to stop her from going around a security checkpoint, is ongoing, said Sgt. Kimberly Schneider, spokeswoman for Capitol Hill police. However, police have notified the federal prosecutor's office in Washington that they will be seeking an arrest warrant after the investigation is complete next...