Presumptive Republican presidential nominee Donald Trump on Thursday positioned himself on the far left of the political spectrum on fiscal issues, coming out for low interest rates, against a strong dollar and a more aggressive managing of U.S. debt.

In a wide-ranging phone conversation with CNBC, Trump said he would replace Federal Reserve Chairwoman Janet Yellen when her term expires in 2018, though he didn’t really offer up any criticism of her.

“I have nothing against Janet Yellen whatsoever, she’s very capable person. But she’s not a Republican,” Trump said. “When her time is up I would most likely replace because of the fact it would be appropriate.

“She is a low interest rate person, she’s always been a low-interest-rate person, and let’s be honest, I’m a low-interest-rate person,” Trump added.

Trump shifted to a discussion of the impact that higher rates has on the dollar, and on the impact a rising dollar has on U.S. business.

“If we raise interest rates and if the dollar starts getting too strong, we’ll have some very major problems.”

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“I love the concept of a strong dollar, but when you look at the havoc that a strong dollar causes ... it sounds better to have a strong dollar than it actually is.”

Besides the dollar DXY, +0.03% hurting business, Trump also fretted about the impact on the U.S. debt if rates were to climb.

“I am the king of debt, I love playing with it, but now we’re talking about something very, very fragile,” he said.

One thing Trump advocated that the U.S. Treasury has resisted is a more active management of the debt. The U.S. Treasury hasn’t taken advantage of current low interest rates to issue more longer-term debt.

“I think there are times for us to refinance debt with longer term, we owe so much money,” Trump said.

While at times Trump seemed to link a conversation of refinancing with a situation where “the bubble popped” — at one point even suggesting a buyback of U.S. debt — he also made clear that he wanted to refinance now, to rebuild infrastructure.

When pointed out that the current Republican-led Congress has resisted calls to spend more on infrastructure, Trump said his expertise in that area could change minds.

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Elsewhere, Trump said there’s a 40% chance he’ll pick a vice presidential nominee among the 16 other Republicans who ran for president. He said it’s “unlikely” to be Ohio Gov. John Kasich.

The latest RealClearPolitics average of polls has Hillary Clinton leading Trump by a 47.3% to 40.8% margin.