Yes, this is possible although it's more likely that a country with a low GDP would have a high poverty rate. GDP is a total measure out output/production and doesn't take into account individual wealth.
Senate? A senate is a chamber of a bicameral legislature I think,
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Eli Whitney is best remembered as the inventor of the cotton gin.
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The federal government of the United States (U.S. federal government) is the national government of the United States, a federal republic in North America, composed of 50 states, a federal district, five major self-governing territories and several island possessions
Because the South wanted to become their own separate country. They even elected their own president.