Even though some anti-imperialists like George F. Hoar were against the annexation of the Philippines as they believed it was against the traditional American republican deals, Albert Beveridge was an imperialist who supported this idea.
This is because Albert Beveridge believed that the US was superior to any other country and had the right to expand further into other foreign territories.
He also believed that the whites were superior to any other race and thus, they should conquer the world.