Donald John Trump is the 45th and current President of the United States; he took office on January 20, 2017. Previously, he was a real estate mogul and a former reality TV star. Born in Queens, New York, in 1946, Trump became involved in large, profitable building projects in Manhattan. In 1980, he opened the Grand Hyatt New York, which made him the city's best-known developer. In 2004, Trump began starring in the hit NBC reality series The Apprentice. Trump turned his attention to politics, and in 2015 he announced his candidacy for president of the United States on the Republican ticket. After winning a majority of the primaries and caucuses, Trump became the official Republican candidate for president on July 19, 2016. That November, Trump was elected the 45th President of the United States, after defeating Democratic candidate Hillary Clinton.