Nearly 20,000 police officers have been deployed across Metro Manila for the summit, with progressive groups expecting thousands to turn out on Tuesday for an anti-Trump march at the summit site. (EPA Images pic)MANILA: A key regional summit opened Sunday in Manila, with Southeast Asian heads of state grappling with the Middle East crisis and their own regional flashpoints and global leaders finding common ground over US President Donald Trump's trade war.

Trump is scheduled to arrive Tuesday, near the summit's conclusion, a visit that will include a meeting with the leaders of his fellow Quad countries India, Japan and Australia – the first such sit-down of his second term.

But it was the US leader's tariff blizzard that Brazil's newly re-elected president Luiz Inacio Lula da Silva had on his mind Sunday in Manila.