Parti Bersatu Sabah (PBS) is open to political cooperation with any Sabah-based parties, including the Opposition, for the sake of Sabahans, says its president Datuk Seri Dr Maximus Ongkili. Ongkili, who is also Minister in the Prime Minister's Department (Sabah and Sarawak Affairs) said PBS always welcomes political allies who share the party's political aspirations to make Sabah better for its people.