Durham, N.C. — First lady Michelle Obama will return to central North Carolina Sept. 19 to campaign for her husband, President Barack Obama's campaign announced Friday morning. 

Details about Michelle Obama's visit were limited Friday morning, but the campaign said she would visit Durham and Greenville for grassroots events. 

The following day, Gary Johnson, the Libertarian Party presidential candidate, will pay a visit to Duke University.

Johnson's campaign cites the enthusiasm of young voters for an increase in Libertarian registration in recent months. "As I travel the country, I've found that young people are as concerned as anybody about where this country is headed – maybe even more so, since they know the national debt will be theirs to inherit," Johnson, the former governor of New Mexico, said. ""Along the campaign trail, I've been thrilled to find tremendous support from people in their 20's who are embracing liberty like never before."

Johnson will speak at Reynolds Theater at 7 p.m. Sept. 20.

Obama visited Greensboro in August, campaigning at the University of North Carolina at Greensboro as part of her "It Takes One" initiative, which calls on supporters to encourage friends and neighbors to volunteer in the election and get to the polls in November.