Mrs. Johnson was one of our most important First Ladies. Quietly but firmly, she advised LBJ on rhetoric, strategy, and personal relations and helped to dampen his volatile mood swings.
During his last 18 months in office, Eisenhower flew to Asia, Europe, and Latin America and deployed his war hero's popularity to seek new friends for America while trying to improve relations with Moscow. By the time Ike left office, most Americans had forgotten their anger over losing the space race to the Soviets.
Historians often find important decisions few knew were important at the time.
Reagan's defense buildup and SDI, so ridiculed at the time, pressed Gorbachev, while his economy was collapsing, to make arms deals and improve relations with the West, which contributed to the unraveling of his empire.
Franklin Roosevelt, Dwight Eisenhower, and Ronald Reagan each suffered through his second four years. FDR was checkmated by Congress and the Supreme Court. Ike was dogged by Sputnik and reckless charges that the United States suffered from a Missile Gap. Reagan had to wend his way through Iran-Contra.
Oftentimes during the period in which conventions really did business, you had situations where the delegates were divided and you would have ballot after ballot before there was a final nominee.