PETALING JAYA: New Gerakan president Datuk Mah Siew Keong has not ruled out the possibility of a merger with Barisan Nasional parties. However, Mah said his focus would be on strengthening the cooperation between the parties. "We will work towards increasing the cooperation between the parties, so that BN will be stronger." He said a merger would require efforts from all the component parties and Gerakan was ready to explore…