Two
Presidents serve one term before they must be reelected.
A term is 4 yrs with 2 terms max if reelected (US)
Six years. Presidents in Mexico cannot be reelected.
20
Eisenhower was elected to a second term in November of 1956.
Andrew Johnson.
Grant was elected a second time in November of 1872.
He was reelected as president 1804.
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5 of the first 10 presidents were re-elected for a second term.
Because he did good and people liked him his first term when he protected us they felt and stuff. But his second term he knew that he could not get reelected again he did whatever he wanted.
Most of the Presidents who were relected, were popular with the voters 4 years after they were elected to their first term. A few reelected Presidents, such as LBJ in 1968 and RM Nixon in 1974, lost their popularity after reelection.