<P> Momentum built for Ted Kennedy after Carter's attempt to rescue the hostages on April 25 ended in disaster and drew further skepticism towards Carter's leadership ability . Nevertheless, Carter was still able to maintain a substantial lead even after Kennedy won the key states of California and New Jersey in June . Despite this, Kennedy refused to drop out, and the 1980 Democratic National Convention was one of the nastiest on record . On the penultimate day, Kennedy conceded the nomination and called for a more liberal party platform in what many saw as the best speech of his career . On the stage on the final day, Kennedy for the most part ignored Carter . </P> <P> The three major candidates: </P> <Table> <Tr> <Th> Candidate </Th> <Th> </Th> <Th> Office Held </Th> <Th> State </Th> <Th> Popular vote </Th> <Th> Delegations Won </Th> </Tr> <Tr> <Td> Jimmy Carter </Td> <Td> October 1, 1924 (age 55) Plains, Georgia </Td> <Td> 39th President of the United States (1977 - 1981) Incumbent </Td> <Td> Georgia </Td> <Td> 10,043,016 (51.13%) </Td> <Td> IA, ME, NH, VT, AL, FL, GA, PR, IL, KS, WI LA, TX, IN, NC, TN, NE, MD, OK, AR ID, KY, NV, MT, OH, WV, MO, OR, WA </Td> </Tr> <Tr> <Td> Ted Kennedy </Td> <Td> February 22, 1932 (age 48) Boston, Massachusetts </Td> <Td> U.S. Senator from Massachusetts (1962 - 2009) </Td> <Td> Massachusetts </Td> <Td> 7,381,693 (37.58%) </Td> <Td> AZ, MA, CT, NY, PA, ND DC, CA, NJ, NM, RI, SD </Td> </Tr> <Tr> <Td_colspan="4"> Unpledged </Td> <Td> 1,288,423 (6.56%) </Td> <Td> MI, AK </Td> </Tr> <Tr> <Td> Jerry Brown </Td> <Td> April 7, 1938 (age 42) San Francisco, California </Td> <Td> 34th Governor of California (1975 - 1983) </Td> <Td> California </Td> <Td> 575,296 (2.93%) </Td> <Td>--</Td> </Tr> </Table> <Tr> <Th> Candidate </Th> <Th> </Th> <Th> Office Held </Th> <Th> State </Th> <Th> Popular vote </Th> <Th> Delegations Won </Th> </Tr>

Who challenged jimmy carter for the democratic nomination for president in 1980