The camp of Davao City Mayor Rodrigo Duterte on Saturday accused the Liberal Party (LP) of hatching a “black propaganda” and a “psychological warfare operations” to derail his presidential bid.

In a statement, Duterte’s camp said that the ruling party wanted to paint Duterte as a pro-American candidate hiding behind the platform of federalism to grant US companies access to Mindanao’s rich mineral resources, particularly metallic ores.