Republican Presidential nominee Donald Trump on Wednesday thanked his wife Melania Trump in a speech he delivered as he neared the halfway mark in the race for the US President's post.

He also praised her book, calling it the top-selling book in the country. In the memoir, Melania Trump wrote about her pro-choice stance on abortion, when she met Donald Trump in a New York City night club, and rumours about her son having autism, but left out many personal details of her life.

"She works very hard to help people. So, I just wanted to thank her," Mr Trump said during his address in Florida.

Speaking at the Palm Beach Convention Centre in Florida as he reached the brink of victory, Mr Trump promised to bring a ?golden age? for America, after being handed a mandate he called ?unprecedented and powerful?.

Vice President-elect J D Vance and his Indian-American wife Usha Vance were also present on the podium. Trump praised both his running mate and Usha for their support throughout the process.

"This was a movement like nobody's ever seen before, and frankly, this was, I believe, the greatest political movement of all time. There's never been anything like this in this country and maybe beyond, and now it's going to reach a new level of importance because we're going to help our country heal," said the President-elect. The inauguration is scheduled for January 20.