<Dd> Justices who served in Congress </Dd> <Dd> Ideological leanings of justices </Dd> <Tr> <Th> Court functionaries </Th> </Tr> <Tr> <Td> <Ul> <Li> Clerks </Li> <Li> Reporter of Decisions </Li> <Li> Supreme Court Police </Li> </Ul> </Td> </Tr>

3 factors that explain which cases are selected by ussc