Money for the Trump presidential campaign is certainly no concern. At the Iowa State Fair this weekend, The Donald told a reporter he would be willing to spend $1 billion on a presidential bid.

When a reporter asked Trump, just outside the Iowa State Fair grounds on Saturday, if he would throw a billion of his own money into the campaign, he answered without hesitation.

"I would do that, yeah," Trump responded. "If I had to."

When asked what his campaign budget was, Trump responded that the question was irrelevant.

"You saw I make $400 million a year," Trump replied, "so what difference does it make?" He continued on to say that all he wanted to do was "make the country great again. That's all I want to do. That's much more important. We can't make it great unless we make it rich."

Trump also said he is confident in his campaign decisions so far. "I don't think I've made mistakes," he told reporters in Iowa. "I mean, every time they say I make a mistake, they do the polls, and my numbers go up. So I guess I haven't made any mistakes."

In addition to talking about how much money he is willing to spend on a presidential campaign, Trump took a swipe at Jeb Bush's position on Iraq.

"He says the United States has to prove to Iraq that we have skin in the game ... I think it may be one of the dumbest statements I've ever heard. Skin in the game! We don't have to prove anything," Trump said. "First of all, the Iraqi officials are a bunch of crooks, if there even is an Iraq -- which I don't think there is -- Iran is taking over Iraq. It was one of the dumbest things ever."

But when asked what he would do about Iraq, Trump responded, "Well you're going to have to use very forceful action. Very, very forceful action."