The national conventions of these two parties make the formal nominations.
Democratic Republican
In 2000, the Republican Party Presidential Nominee was Texas Governor George W. Bush, and the Democratic Party Presidential Nominee was U.S. Vice President Al Gore.
Usually they are senators or governors who are often nominated. The Vice President is 99% nominated with no doubt, except if they don't want to.
Horace Greeley is your answer. But he didn't win. There was a split within the Republican Party that resulted in a defection of many Liberal Republicans to opponent Horace Greeley. The other major political party, the Democratic Party, also nominated the candidates of the Liberal Republican ticket that year.
She was not nominated , but she entered primaries and made a serious campaign for the Democratic nomination. No woman has ever been nominated for president by a major party. There have been some women who ran as protest candidates with no hope of winning.
Picked individually by the candidates for president
Our Taxes will be lower
Republican
The Democratic Party nominated Grover Cleveland for president
In the Presidential Election of 1876, the Democrats nominated Samuel J. Tilden of New York, the Republicans nominated Rutherford B. Hayes of Ohio, and the National Greenback Party nominated Peter Cooper of New York.
The incumbent President Ronald Reagan ran for the Republican Party, and former Vice President Walter Mondale was the nominee for the Democratic Party.
Jefferson Davis