Trump's fortune slides by $600 mn on Forbes wealth list

America's richest may be getting richer but President Donald Trump's fortune has slid by $600 million to $3.1 billion, according to a list of 400 billionaires released by Forbes magazine on Tuesday.Microsoft co-founder Bill Gates topped the list for a 24th consecutive year on a net worth of $89 billion with Amazon's Jeff Bezos, worth $81.5 billion, number two.Forbes attributed Trump's decline to a weakening New York retail and office real estate market, and new information about his assets.