Billionaire Donald Trump has emerged as the last man standing in the Republican primary following the withdrawal of Ohio Governor John Kasich and Texas Senator Ted Cruz.
Mr Trump has shocked the political establishment with a divisive campaign based on attacks against Mexicans, Muslims, and other candidates.
Yet now, he says he will act to unify the country.
"This country, which is very divided in so many different ways, is going to become one beautiful, loving country, and we are going to love each other," Mr Trump says.
Trump also expressed admiration for his fierce rival, Mr Cruz, who he previously attacked as "Lyin' Ted".
"He is one hell of a competitor," Mr Trump says. "A tough, smart guy."
"We gave it everything we've got, but the voters chose another path," a disappointed Mr Cruz said in a concession speech to supporters.
Mr Trump will now struggle to unify the Republican Party behind him, with his polarising stances creating many bitter enemies. Many Republicans have burnt their voting cards, and have sworn never to support Mr Trump.
"It's a pretty sad day," one disillusioned voter says.
"I can't believe America's taking him seriously," says another.
This will only help Democrat frontrunner Hillary Clinton, who is still struggling to drive Senator Bernie Sanders out of the race against her, with Mr Sanders recently winning the Indiana Primary.
Ms Clinton has lashed out at Mr Trump, calling him a "loose cannon".
But Mr Trump remains defiant, with strong support amongst those who feel victimised by recent cultural and economic forces. He has continued to win, despite the opposition of Republican leaders.
Ultimately, the only person who can stop Mr Trump may be himself.