You can't be a citizen of Kenya and then decide to be a Citizen of the USA, it doesn't work that way. To be President YOU MUST BE A NATURAL BORN CITIZEN!!!
Maybe if you read up on your US Constitution a little bit you would be more informed.
"No person except a
natural born citizen, or a citizen of the United States, at the time of the adoption of this Constitution, shall be eligible to the office of President; neither shall any person be eligible to that office who shall not have attained to the age of thirty five years, and been fourteen Years a resident within the United States."
http://www.law.cornell.edu/constitution/constitution.articleii.html#section1