Donald Trump has said that he will spend at least $2million a week on his campaign to become the Republican party’s presidential candidate.
The billionaire frontrunner, who has not spent large sums as part of his bid to date, said he will earmark $2million a week for television advertising in the first three voting states.
The controversial figure has said that, although he did not believe he needed to spend any money, he did not want to take anything for granted.
He said: “I don’t think I need to spend anything. And I’m very proud of the fact that I’ve spent the least and achieved the best result.
“I feel I should spend. And honestly I don’t want to take any chances.”
The 69-year-old has spent nothing on television advertising so far, but more than $300,000 on radio advertising time – still far less than his rivals.
Donald Trump's most controversial quotes
Donald Trump's most controversial quotes
1/14 On Isis:
"Some of the candidates, they went in and didn’t know the air conditioner didn’t work and sweated like dogs, and they didn’t know the room was too big because they didn’t have anybody there. How are they going to beat ISIS?"
2/14 On immigration:
"I will build a great wall — and nobody builds walls better than me, believe me —and I’ll build them very inexpensively. I will build a great, great wall on our southern border, and I will make Mexico pay for that wall. Mark my words."
3/14 On Free Trade:
"Free trade is terrible. Free trade can be wonderful if you have smart people. But we have stupid people."
PAUL J. RICHARDS | AFP | Getty Images
4/14 On Mexicans:
"When Mexico sends its people, they’re not sending their best. They’re sending people that have lots of problems. They’re bringing drugs. They’re bringing crime. They’re rapists."
5/14 On China:
"I just sold an apartment for $15 million to somebody from China. Am I supposed to dislike them?... I love China. The biggest bank in the world is from China. You know where their United States headquarters is located? In this building, in Trump Tower."
6/14 On work:
"If you're interested in 'balancing' work and pleasure, stop trying to balance them. Instead make your work more pleasurable."
7/14 On success:
"What separates the winners from the losers is how a person reacts to each new twist of fate."
8/14 On life:
"Everything in life is luck."
9/14 On ambition:
"You have to think anyway, so why not think big?"
10/14 On his opponents:
"Bush is totally in favour of Common Core. I don't see how he can possibly get the nomination. He's weak on immigration. He's in favour of Common Core. How the hell can you vote for this guy? You just can't do it."
11/14 On Obamacare:
"You have to be hit by a tractor, literally, a tractor, to use it, because the deductibles are so high. It's virtually useless. And remember the $5 billion web site?... I have so many web sites, I have them all over the place. I hire people, they do a web site. It costs me $3."
12/14 On Barack Obama:
"Obama is going to be out playing golf. He might be on one of my courses. I would invite him. I have the best courses in the world. I have one right next to the White House."
13/14 On himself:
"Love him or hate him, Trump is a man who is certain about what he wants and sets out to get it, no holds barred. Women find his power almost as much of a turn-on as his money."
14/14 On America:
"The American Dream is dead. But if I get elected president I will bring it back bigger and better and stronger than ever before and we will make America great again."
Former Florida governor Jeb Bush has spent more than $40million on his campaign, but is trailing Mr Trump and several other candidates in the nomination race.
The majority of Mr Trump’s campaign has been funded by donors across the country, sending him cheques or buying merchandise from his website.
“I’ll be spending a minimum of $2million a week and perhaps substantially more than that,” he said.
“If somebody attacks me, I will attack them very much and very hard in terms of ads.”
Trump said he had screened his first two adverts, which touch on immigration, trade and national security policy.
When the real estate mogul announced his candidacy in June, he said he planned to spend $35million by 1 January 2016.
But his provocative and plain-speaking style has resulted in a steady stream of media coverage - which has included, in recent weeks, his call to ban all Muslims from entering the US and claim that Democratic frontrunner Hillary Clinton was “schlonged” to the presidency by Barack Obama when they both ran for their party’s nomination in 2008.
Mr Trump has also said he believes that the thousands of people who attend his rallies will ultimately turn out and vote for him.
Iowa’s caucuses will begin the voting on 1 February.
Additional reporting by the Associated Press