During the 1976 election campaign, jimmy carter famously promised

that he would never start a war
that he would never be unfaithful to his wife
that he had never smoked marijuana
that he would never lie

That he would never lie.

Explanation:

Mr. Jimmy Carter was the 39th president of United States.

During his government he had to deal big troubles as unemployed and a big inflation.  He always be a pacific men and tried to keep his administration out of belic conflicts.

In the  middle of election campaign he traveled around the country making speeches and meetings. His core message  was return to the honesty and I will never tell a lie.