Was Martin Luther King, Jr., a President?I am not from here and I would like to know if USA had a black president in the past.

No, the United States has never had an African-American president before.  I honestly did not know if I might see it in my lifetime, and I am only 38 years old.  Martin Luther King, Jr., was a very important civil rights activist and preacher who forever changed the civil rights world for the better.  His contributions are endless and timeless. 

We very well may have our first president who is half African-American (his father was African) and half-Caucasian (his mother was white).  Many people refer to Barack Obama as African-American; however, he is half-African American and half-Caucasian.  Mr. Obama is very proud of his mixed heritage. 

One of the things that makes me very excited that he may become president is that so many older African-Americans who never thought they would see an African-American be president  will finally have that chance (hopefully).   It has been amazing to be a witness to the historic nature of Obama's rise to prominence.  Incredible!