US Republican presidential candidate, real estate mogul and TV personality Donald Trump holds his financial statement while formally announcing his campaign for the 2016 Republican presidential nomination during an event at Trump Tower in New York June 16, 2015. [Photo/Agencies]

NEW YORK - Real estate mogul and TV personality Donald Trump barged his way into the 2016 US presidential election on Tuesday in a blitz of boasts, inflammatory comments and attacks on both fellow Republicans and President Barack Obama's administration.

Trump wallowed in political incorrectness as he insulted everyone from Mexican immigrants to Jeb Bush and US ally Saudi Arabia in announcing his bid for the Republican nomination.

"I will be the greatest jobs president that God ever created," Trump predicted in a long, combative speech in the atrium of Trump Tower on Manhattan's Fifth Avenue.

The billionaire, widely seen as having almost no chance of winning the nomination, brings an outsized personality and a penchant for controversy to an unusually large group of Republicans vying for the presidency.