What obstacles did John F. Kennedy overcome in order to prove his credibility to the American people at his time in history?

Perhaps the greatest obstacle John F. Kennedy had to overcome to become president was his religious background as an Irish Roman Catholic. Most presidents had been Protestant.

Answer;

John F. Kennedy overcame obstacles in order to prove his credibility to the American people at his time in history, the greatest obstacle he had to overcome to become president was his religious background as an Irish Catholic. Most presidents had been Protestant.

Explanation;

Kennedy won the election by a very slight margin.

He still had a lot to prove to many Americans regarding his ability to be President of the United States. Beyond the usual party line concerns, Kennedy's Irish descent, his religion (he was the first Roman Catholic elected president), and his age were serious concerns for many Americans.