(CNSNews.com) - When it comes to foreign policy advice, "I'm speaking to myself, number one, because I have a very good brain," Republican Donald Trump told MSNBC's "Morning Joe" on Wednesday.
Trump said he understood the threat posed by Osama bin Laden even before the World Trade Center came down.
"So I know what I'm doing.
"And I listen to a lot of people, I talk to a lot of people, and at the appropriate time, I will tell you who the people are. But I speak to a lot of people, but my primary consultant is myself. You know, I have a good instinct for this stuff."
Trump said he would not describe himself as a neo-isolationist. He noted that he opposed the war in Iraq launched by George W. Bush, but he also believes "we have to take out ISIS."
"You know, the problem you have today is weaponry...If this was 50 years ago or a hundred years ago, when you fought by gun and by sword, I would have never -- I would have been out of there so fast, but the problem is, you can't allow someone to get the big weaponry."
"Does that mean a ground war, ground troops?" host Joe Scarborough asked.
"It means we have to take ISIS out," Trump said. "And I would consult with very good people, I would consult with the best people...I would much prefer getting some of the boots -- some of the other nations in our world involved. And let them do something for a change."
Trump noted that the Russians have started pulling out of Syria. War is a "very expensive process," he said.
"And I can just imagine Putin with oil prices low, and every time he drops a bomb it costs a million dollars or something, and he's saying, wow."
Trump said the cost of the Afghanistan war is what broke up the Soviet Union. "So I can just see Putin saying, this is more expensive than I thought, and he gets out.
"You know, at some point we have to get back to rebuilding our country. Not rebuilding. To start to build it, because the country is crumbling."