It you are famous, you announce to the press that you are running for President. It may make a small story in the papers and on TV news.
To get on the ballot, you have a file a petition in each state. The petition consists of a required number of registed voters from that state. There is a filing fee.
I think he can run again for president.
J. Strom Thurmond
Barak Obama was the first to be both nominated and elected; others like Jesse Jackson have run, but were not nominated.
He was ejected from his party while he was president and was not nominated for a second term.
He was the governor of California before he ran for president.
ignored Texas
Franklin D. Roosevelt
Johnson ran successfully for vice-president with Lincoln heading the ticket in 1864. He was never nominated for president.
Harriman was a strong candidate for the Democratic nomination in 1952 and 1956 but was not nominated.
Because a female candidate has never been nominated to run for the position.
He never was. When the idea was suggested, he declared "If nominated, I will not run. If elected, I will not serve."
In the electoral campaign of 1860, Lincoln was nominated by the Republican Party to run for President against Steven A. Douglas.