A look at key events in Donald Trump's business career

A look at key events in Donald Trump's business career, as voters head to the polls on Super Tuesday:

—1978: Opens glittering $100 million hotel at Grand Central Station in New York to replace decaying Commodore Hotel.

—1980: Breaks ground on Trump Tower, his soaring Fifth Avenue luxury condo building.

—1984: Gambles on casinos, opening Trump Plaza in Atlantic City. Trump's Castle follows a year later; next, the $1 billion Trump Taj Mahal.

—1987: Publishes "The Art of the Deal," a New York Times best seller.

—1989: For new airline, Trump Shuttle, promises "best of everything," but loses control to lenders and eventually sells it.

—1991: First of four Trump casino bankruptcies. Trump Taj Mahal threatens his personal fortune because he personally guaranteed debt, but dealmaking spares him big loss.

—2004: Joins forces with NBC to launch "The Apprentice," the long-running reality TV show.

—2005: Expands brand into clothing and accessories with the "Donald J. Trump Signature Collection" so fans can wear Trump-branded suits, shirts, ties, cufflinks, eyewear, leather goods and belts.

—2008: Opens first property in Chicago, the 92-story Trump International Hotel & Tower.

—2009: Tells crowd of 5,000 in Miami that his new health products company, Trump Networks, will be the "biggest in the industry." Company struggles and Trump sells it four years later.

—2012: Wins right to convert Old Post Office Building in Washington into 300-room hotel, promising "one of the most luxurious in the world."

—2014: Buys Ireland's Doonbeg golf club and Scotland's Turnberry Resort, the site of several British Opens and his 17th golf course.