<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>

According to the timeline when is the president of the united states really chosen