Well one push factor would be they wanted to escape religious and political prosecution. Another is the Potato Famine. This was when their potatoes were contaminated and many died from starvation and disease.
I hope this helps somehow ;)
Henry clay was the negioator
The Anti-imperialist league formed to fight U.S. annexation of the Philippines, citing a variety of reasons ranging from the economic to the legal to the racial to the moral. It included among its members such notables as Andrew Carnegie, Mark Twain, William James, David Starr Jordan, and Samuel Gompers with George S. Boutwell, former secretary of the Treasury and Massachusetts, as its president. Following the signing of the Treaty of Paris, the league began to decline and eventually disappeared.
