City crews over the weekend began hanging 90 red, white and blue banners downtown to promote the Jan. 29 event at the Peace Center for the Performing Arts.
The state Democratic Party is paying for the banners and the labor to mount them on poles.
The banners, with the state and national flags, note the Young Democrats of South Carolina's sponsorship with Furman University of the debate before the state's first-in-the-South primary on Feb. 3.
Debate spokesman Doug Dent said the banners foreshadow more hoopla in the days ahead. He estimated 350 reporters will join an expected 10,000 to 20,000 people in town for two days for the event.
"It's probably going to be the biggest media event this city has ever seen," he said. "We're going to turn Greenville into one big Democratic party."
Information from: The Greenville News