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 ;)
Countries targeted by the Cairo Conference include the United States, the United Kingdom and China.
The Cairo Conference was held in that Egyptian city from November 22 to 26, 1943. It defined the allied position against Japan during World War II and made decisions about the future of post-war Asia. Attending the meeting were President Franklin Roosevelt for the United States, Prime Minister Winston Churchill for the United Kingdom, and Chiang Kai-shek for the Republic of China.
The "Cairo Declaration" was signed on November 27, 1943 and made public in a statement on the radio on December 1, noting the intention of the Allies to continue the deployment of military force until the unconditional surrender of Japan.
Thrirteen years after the American revolution started France had a revolution that modeled after ours when Texas fought for its independence other countries also used our declaration as a guide for their fight for freedom
The difference is that when serving they: hold hearings, and develop as well as vote on legislation, all bills must also go through the congress before being passed, while representing they attend to the needs of the constituents of the federal government so they give special attention to request from people of higher interest
Can you be a bit more specific? I might be able to help you if you be a little more specific.