I believe that Abraham Lincoln had the greatest impact.  He gave his four score speech, which helped us in history one way and made us better as a country.  I believe the hardest thing about being a president is the fact you have to travel all over the world, make peace with other countries, and still pass or veto bills to maintain control. I honestly have no idea what my campaign pitch would be if I ran for president.  It would be a hard decision to choose one because you would have to come up with facts to support that pitch.