Mitt Romney's Mormonism may be "the most American of all religions," yet it remains an issue for many Republican voters.

It could be enlightening, according to an article by The Huffington Post, to take another look at the way U.S. presidents have approached faith through the years, which it does by examining "eight presidents whose religious lives have troubled and fascinated Americans, or whose faiths may surprise us even today."

From Andrew Jackson's refusal to institute a national day of prayer and fasting during a crisis in order to maintain religious security in its separation from government, to how Abraham Lincoln "clearly sought the will of God and divine direction during what he called the 'butchering business' of the Civil War," a closer look is given to how "the men who have been president have often struggled to balance their private faith with their public duties."

The article features presidents Andrew Jackson, James K. Polk, Lincoln, Franklin D. Roosevelt, Harry Truman, Dwight D. Eisenhower, John F. Kennedy and Jimmy Carter, and also has a slideshow revealing the faiths of all of the U.S. presidents.