Many economists say raising the debt limit is essential to avoid a potential catastrophic default. In recent years, conservative lawmakers have tied increasing that cap to demands for spending cuts. President Barack Obama has said he won't negotiate over the issue.
Photos of Ben Carson on the campaign trail:
Ben Carson on the campaign trail
Ben Carson botched an interview about the debt ceiling
MT. AYR, IA - JANUARY 22 : Republican presidential candidate Ben Carson is introduced during his 'Trust in God Townhall' campaign stop January 22, 2016 in Mt. Ayr, Iowa. Carson, who is seeking the nomination from the Republican Party is on the presidential campaign trail across Iowa ahead of the Iowa Caucus taking place February 1. (Photo by Joshua Lott/Getty Images)
Ben Carson, 2016 Republican presidential candidate, speaks during a Liberty University Convocation in Lynchburg, Virginia, U.S., on Wednesday, Nov. 11, 2015. As retired neurosurgeon Carson has risen in the polls, media reports have revisited his accounts of acts of violence as a child, a key part of the redemption story he discusses on the campaign trail. Photographer: Andrew Harrer/Bloomberg via Getty Images
PALM BEACH GARDENS, FL - NOVEMBER 06: Republican presidential candidate Ben Carson speaks to the media before speaking at a gala for the Black Republican Caucus of South Florida at PGA National Resort on November 6, 2015 in Palm Beach, Florida. Carson has come under media scrutiny for possibly exaggerating his background and other statements he has made recently. (Photo by Joe Raedle/Getty Images)
DES MOINES, IA - AUGUST 16: Republican presidential hopeful Ben Carson (L) eats a piece of pizza while touring the Iowa State Fair on August 16, 2015 in Des Moines, Iowa. Presidential candidates are addressing attendees at the Iowa State Fair on the Des Moines Register Presidential Soapbox stage and touring the fairgrounds. The State Fair runs through August 23. (Photo by Justin Sullivan/Getty Images)
LAKEWOOD, CO - OCTOBER 29: Republican presidential candidate Ben Carson speaks during a news conference before a campaign event at Colorado Christian University on October 29, 2015 in Lakewood, Colorado. Ben Carson was back on the campaign trail a day after the third republican debate held at the University of Colorado Boulder. (Photo by Justin Sullivan/Getty Images)
WASHINGTON, DC - SEPTEMBER 25: Scenes around the the Value Voters Summit on September 25, 2015 in Washington DC. Republican presidential candidate Ben Carson takes the stage at the event. Dr Carson speaks to the media after the speach. (Photos by Charles Ommanney/The Washington Post via Getty Images)
Attendees wait for Ben Carson, 2016 Republican presidential candidate, not pictured, to arrive during a campaign stop at the birthplace of the Michigan Republican Party in Jackson, Michigan, U.S., on Wednesday, Sept. 23, 2015. Carson, the third candidate in the Republican race to have never held elected office, saw his numbers drop following the debate last week. Photographer: Luke Sharrett/Bloomberg via Getty Images
Ben Carson, 2016 Republican presidential candidate, listens as he attends a service at Maple Street Missionary Baptist Church in Des Moines, Iowa, U.S., on Sunday, Aug. 16, 2015. Carson will be speaking at the Iowa State Fair, which is expected to host 18 presidential candidates and runs until Aug. 23. Photographer: Daniel Acker/Bloomberg via Getty Images
CLEVELAND, OH - AUGUST 06: Republican presidential candidate Ben Carson participates in the first prime-time presidential debate hosted by FOX News and Facebook at the Quicken Loans Arena August 6, 2015 in Cleveland, Ohio. The top-ten GOP candidates were selected to participate in the debate based on their rank in an average of the five most recent national political polls. (Photo by Chip Somodevilla/Getty Images)
Ben Carson, 2016 Republican presidential candidate, eats a slice of pizza as he tours the Iowa State Fair in Des Moines, Iowa, U.S., on Sunday, Aug. 16, 2015. In a Sunday interview with Fox News, Carson doubled down on his assertion that a speech given by President Barack Obama intended to sell the American public on his nuclear deal with Iran contained 'coded innuendos employing standard anti-Semitic themes.' Photographer: Daniel Acker/Bloomberg via Getty Images
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Carson told Ryssdal that he "would not sign an increased budget," but as the radio host repeatedly noted, raising the debt limit only addresses the US' ability to pay the debt it's already amassed.
"I'm going try one more time, sir," Ryssdal said after explaining the issue a few times. "This is debt that's already obligated. Would you not favor increasing the debt limit to pay the debts already incurred?"
They then moved onto other topics.
For Carson, a political neophyte, the wonky but important debt-limit issue could raise additional concerns among his critics who say he's unprepared for the Oval Office.
Ryssdal: All right, so let's talk about debt then and the budget. As you know, Treasury Secretary Lew has come out in the last couple of days and said, "We're going to run out of money, we're going to run out of borrowing authority, on the fifth of November." Should the Congress then and the president not raise the debt limit? Should we default on our debt?
Carson: Let me put it this way: If I were the president, I would not sign an increased budget. Absolutely would not do it. They would have to find a place to cut.
Ryssdal: To be clear, it's increasing the debt limit, not the budget, but I want to make sure I understand you. You'd let the United States default rather than raise the debt limit?
Carson: No, I would provide the kind of leadership that says, "Get on the stick guys, and stop messing around, and cut where you need to cut, because we're not raising any spending limits, period."
Ryssdal: I'm going try one more time, sir. This is debt that's already obligated. Would you not favor increasing the debt limit to pay the debts already incurred?
Carson: What I'm saying is what we have to do is restructure the way that we create debt. I mean if we continue along this, where does it stop? It never stops. You're always going ask the same question every year. And we're just gonna keep going down that pathway. That's one of the things I think that the people are tired of.
Ryssdal: I'm really trying not to be circular here, Dr. Carson, but if you're not going to raise the debt limit and you're not going to give specifics on what you're gonna cut, then how are we going to know what you are going to do as president of the United States?
Ben Carson botched an interview about the debt ceiling
BALTIMORE, MD - AUGUST 12: (JAPAN OUT) (VIDEO CAPTURE) In this image from video Dr. Ben Carson talks about his life and education August 12, 2001 in Baltimore, Maryland. Dr. Carson was profiled for a CNN program called 'America's Best: Science and Medicine,' for his preeminence in the field of neurosurgery. (Photo by CNN via Getty Images)
Civil Rights activist Rosa Parks, Ben Carson, Ralph Abernathy and Levy Watkins at Johns Hopkins University during a celebration of the birthday of Martin Luther King Jr, Baltimore, Maryland, 1980. (Photo by Afro American Newspapers/Gado/Getty Images)
Darius Rucker, Candy Carson and Dr. Ben Carson M.D., president and co-founder of Carson Scholars Fund (Photo by Louis Myrie/WireImage)
SCOTTSDALE, AZ - SEPTEMBER 5: Dr. Ben Carson is interviewed during a live streaming Web-A-Thon with Wake Up America September 5, 2014 at the Westin Kierland Resort in Scottsdale, Arizona. Carson is a retired neurosurgeon who would run in the 2016 Presidential campaign as a conservative for the Tea Party. (Photo by Laura Segall/Getty Images)
SCOTTSDALE, AZ - SEPTEMBER 5: Dr. Ben Carson speaks as the keynote speaker at the Wake Up America gala Event September 5, 2014 at the Westin Kierland Resort in Scottsdale, Arizona. Carson is a retired neurosurgeon who would run in the 2016 Presidential campaign as a conservative for the Tea Party. (Photo by Laura Segall/Getty Images)
SCOTTSDALE, AZ - SEPTEMBER 5: Dr. Ben Carson (C) chats with guests after a live streaming Web-A-Thon with Wake Up America September 5, 2014 at the Westin Kierland Resort in Scottsdale, Arizona. Carson is a retired neurosurgeon who would run in the 2016 Presidential campaign as a conservative for the Tea Party. (Photo by Laura Segall/Getty Images)
US conservative Ben Carson is surrounded by supporters as he waits to be interviewed at the annual Conservative Political Action Conference (CPAC) at National Harbor, Maryland, outside Washington,DC on February 26, 2015. AFP PHOTO/NICHOLAS KAMM (Photo credit should read NICHOLAS KAMM/AFP/Getty Images)
NATIONAL HARBOR, MD - FEBRUARY 26: Ben Carson, former neurosurgeon, addresses the 42nd annual Conservative Political Action Conference (CPAC) February 26, 2015 in National Harbor, Maryland. Carson is the author of 'One Nation: What We Can All Do to Save Americas Future' and 'America the Beautiful: Rediscovering What Made This Nation Great'. Conservative activists attended the annual political conference to discuss their agenda. (Photo by Alex Wong/Getty Images)
US conservative Ben Carson addresses the annual Conservative Political Action Conference (CPAC) at National Harbor, Maryland, outside Washington, DC on February 26, 2015. AFP PHOTO/NICHOLAS KAMM (Photo credit should read NICHOLAS KAMM/AFP/Getty Images)
NEW YORK, NY - APRIL 08: Ben Carson attends the National Action Network (NAN) national convention at the Sheraton New York Times Square Hotel on April 8, 2015 in New York City. The network, founded by the Rev. Al Sharpton in 1991 is hosting various politicians, organizers and religious leaders to talk about the nation's most pressing issues. The conservative Carson is widely rumored to be considering a GOP presidential run in 2016. (Photo by Andrew Burton/Getty Images)
DETROIT, MI - MAY 4: Republican Dr. Ben Carson, a retired pediatric neurosurgeon, speaks as he officially announces his candidacy for President of the United States at the Music Hall Center for the Performing Arts May 4, 2015 in Detroit, Michigan. Carson was scheduled to travel today to Iowa, but changed his plans when his mother became critically ill. He now will be traveling to Dallas instead to be with his mother Sonya. (Photo by Bill Pugliano/Getty Images)