<Tr> <Td> Legislature (show) <Ul> <Li> United States Congress </Li> </Ul> <P> </P> <P> </P> <Ul> <Li> House of Representatives </Li> </Ul> <Ul> <Li> Speaker Paul Ryan (R) </Li> </Ul> <Ul> <Li> Majority Leader Kevin McCarthy (R) </Li> </Ul> <Ul> <Li> Minority Leader Nancy Pelosi (D) </Li> </Ul> <Ul> <Li> Congressional districts </Li> </Ul> <P> </P> <Ul> <Li> United States Senate </Li> </Ul> <Ul> <Li> President Mike Pence (R) </Li> </Ul> <Ul> <Li> President Pro Tempore Orrin Hatch (R) </Li> </Ul> <Ul> <Li> President Pro Tempore Emeritus Patrick Leahy (D) </Li> </Ul> <Ul> <Li> Majority Leader Mitch McConnell (R) </Li> </Ul> <Ul> <Li> Minority Leader Chuck Schumer (D) </Li> </Ul> </Td> </Tr> <Ul> <Li> United States Congress </Li> </Ul> <Li> United States Congress </Li> <Ul> <Li> House of Representatives </Li> </Ul>

Explain the origins of interest groups in america