The arrest of former Philippine congressman Zaldy Co has reignited a long-dormant investigation into corruption. This case puts increased political pressure on President Marcos Jr., whom Co accused of profiting from flood control kickbacks.

The arrest of fugitive former congressman Zaldy Co has revived a long-stalled Philippine corruption investigation and sharpened political pressure on President Ferdinand Marcos Jnr, whom the wanted lawmaker has accused of personally benefiting from a multibillion-peso kickback scheme tied to flood control projects. Observers called Co’s arrest a “notable step towards accountability” in a case that had stalled after the collapse of the commission set up to investigate it. Co resigned from the...