<Tr> <Th> Key </Th> <Td> Eligible Democrat (D) </Td> </Tr> <Tr> <Td> Eligible Republican (R) </Td> </Tr> <Tr> <Td> Eligible Independent (I) </Td> </Tr> <Tr> <Td> Eligible Unknown </Td> </Tr>

Who becomes vice president if president is impeached