Quite bluntly: NONE! You can be unable to read or write and still be president if you can get elected.
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Presidential candidates qualify for Federal election funds by registering for them. The candidates must raise individual contribution funds of $5000 in 20 of the States to receive matching funds.
A senatorial candidate must be 30 years old to qualify for election. Candidates for the House of Representatives must be 25 years old to qualify for election. Presidential and vice-presidential candidates must be 35 years old.
each party nominated presidential and vice-presidential candidates
Do the voters elect electors not the presidential candidates
Richard M.Nixon/Spiro Agnew George McGovern/R.Sargent Shriver
national conventions for nominating presidential candidates.
There was no Presidential election in 1950.
35 years. Presidential candidates must be natural born citizens. Naturalized citizens cannot be president.
In reality, states have no position in the nomination of presidential candidates other than holding legal elections. The parties determine the candidates.
During the national convention