As the 2012 presidential race enters the home stretch, here are some key events that have influenced past campaigns in the final 100 days.
Nixon-Kennedy debateThe first ever televised presidential debate is widely credited as a turning point in the 1960 election. Many television viewers thought Sen. John F. Kennedy (D-Mass.), seated left, well-tanned after a month of campaigning in California, won the Sept. 26 debate against Vice President Richard M. Nixon, seated far right, who appeared pale and gaunt after recently being hospitalized. However, many Americans who tuned in to the radio broadcast believed Nixon had triumphed.CBS via AP
As President Obama and Republican candidate Mitt Romney drop hundreds of millions in the fight for votes before Election Day, uncommitted voters in the key states of Florida, Missouri, Ohio and Virginia illustrate just how complicated the decision can be.