There is a difference between accusing and convicting. Anyone can accuse the president of a crime but nothing will happen because of it unless Congress acts on it. In order to convict the president , he first has to be removed from office. This requires impeachment by the House and a 2/3 majority vote by the Senate to convict. After he is removed from office, he can be indicted and tried like any private citizen.
In theory he (or she) could. It is a pretty hard road to go down in any case and adding that baggage would probably be a deal breaker.
What you can do in theory is not always available in the real world.
I don't believe there's any specific prohibition, but it would be very difficult for a convicted felon to be nominated, much less win an election. That's not to say that no presidential candidate (or president, for that matter) has never been guilty of a crime. Andrew Jackson killed a man in a duel, and he was elected anyway. Richard Nixon was most probably guilty of obstruction of justice, at the least, and he left office and was pardoned of any wrongdoing.
Yes
presidential candidate's running mate
The electors are committed to a certain candidate. Their vote is a matter of pubic record. It is not likely that they will contrary to their party.
Attract more voters for the presidential candidate
The candidate for vice-president is nominated at the same national convention that nominates the presidential candidate.
Any American can make campaign contributions to a presidential candidate.
The candidate for vice-president is nominated at the same national convention that nominates the presidential candidate.
John McCain was the United States presidential candidate that was known as a maverick.
Any American can make campaign contributions to a presidential candidate.
Attract more voters for the presidential candidate
Uhuru Kenyatta was an unsuccessful presidential candidate in Kenya in 2002.
Ross Perot was the Reform Party candidate in the 1996 presidential election.
no