A Philippine senator, Jinggoy Estrada, is set to surrender after an arrest warrant was issued for plunder related to a flood-control project. This latest crisis affects the upper chamber of the legislature.

A Philippine senator said he will surrender to authorities after a special anti-corruption court ordered his arrest on Monday on a non-bailable charge of plunder after he allegedly pocketed a huge kickback in a flood-control project in the latest crisis to hit the upper chamber. The special Sandiganbayan anti-corruption court had initially issued a warrant for Senator Jinggoy Estrada’s arrest on Friday on a corruption charge that was bailable. He then surrendered and was released on bail and...