The resurgence of hostilities between Thailand and Cambodia, just weeks after US President Donald Trump brokered a truce over a violent border row, is set to pose significant challenges for the Philippines as the next Asean chair.Thailand last week announced it was suspending the peace agreement with Cambodia, signed at the 47th Association of Southeast Asian Nations summit in Kuala Lumpur on October 26.Bangkok accused its neighbour of laying new mines after several Thai soldiers were injured...