The Democrats have a convention and choose who they want to run for office. That is a nomination. The Republican party also does this.
Robert Kennedy seemed to have almost a lock on the Democratic nomination in 1968 when he was killed.
The Democratic-Republican party
The President Barrack Obama who secured the Democratic nomination with no serious opposition.
HECK YES!
Bill Cliton
to this day, Barack Obama
Senator Ted Kennedy challenged President Carter for the Democratic nomination in the 1980 primaries. Despite a spirited campaign, Kennedy ultimately lost to Carter, who went on to be the Democratic candidate in the general election, where he lost to Republican candidate Ronald Reagan.
He accepted the nomination at the Democratic party's national convention, which was held in Charlotte NC. His acceptance speech occurred on Thursday night, the 6th of September 2012.
can hillary Clinton get the democratic nomination over an incumbent president in 2012
Bill Clinton
technically, no; practically, yes
Shirley Chisholm was the African American who tried to become President of the United States in 1972. She did not win the Democratic nomination that she needed to get on the ballot.