A SNP is a variation of a single nucleotide between individuals. These polymorphisms can therefore be used to discern small differences both within a population and among different populations.
President of the United States. The President of the United States is the head of state of the U.S., the chief executive of the federal government, and Commander-in-Chief of the armed forces. The United States was the first nation to create the office of President as the head of state in a modern republic.
Donald John Trump (born June 14, 1946) is the 45th and current President of the United States. Before entering politics he was a businessman and television personality. Trump was born and raised in Queens, New York City, and earned an economics degree from the Wharton School of the University of Pennsylvania.