MANILA, Philippines (AP) — Twenty-eight people, including activists and a retired Catholic bishop, filed an impeachment complaint Monday against Philippine President Benigno Aquino III for his implementation of a major economic stimulus program that the Supreme Court has declared partly unconstitutional.

The complaint, filed in the House of Representatives, accuses Aquino of culpable violation of the constitution and betrayal of public trust by funding projects outside the Congress-approved annual budget. Lawmakers from three left-wing political parties endorsed it, making it the first valid impeachment complaint against Aquino, but it’s unclear whether it will get enough support in a Congress dominated by Aquino allies.