In 2009, Higgins was a political opponent of the Irish government's re-run of the Treaty of Lisbon referendum. He said the guarantees did not change the Treaty. Higgins said, "The overall agenda here is quite simply the ruling classes, or the classes of Europe intend to stride on to the world stage as a powerful economic entity. And they want to be as powerful as the US, meaning they want a stronger foreign policy and a military wing to back them up." He also spoke out against Ireland's Catholic bishops, who claimed neither a "Yes" nor a "No" vote would threaten the unborn, saying that EU spending on arms ought to be enough for the bishops to join the "No" campaign.