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Dr. Ben Carson to Launch Presidential Campaign on May 4

Carson is a former neurosurgeon who has never held elected office
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 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)NIKON CORPORA / Getty Images
/ Source: NBC News

Dr. Ben Carson will launch his presidential campaign on May 4 in his hometown of Detroit, NBC News confirms.

Carson, a former pediatric neurosurgeon who has never held elected office but has won acclaim from conservatives for his tough criticisms of the Obama administration, formed a presidential exploratory committee in early March.

The Detroit News first reported the date of the announcement.

A recent NBC News/Wall Street Journal poll found that 41 percent of GOP primary voters said they could see themselves supporting Carson, while 18 percent said they could not imagine backing his campaign.

- Mark Murray and Carrie Dann