(CNN) – CNN projects that Arkansas' Democratic primary for the U.S. Senate will go to a runoff.
With 50 percent of precincts reporting Tuesday, Sen. Blanche Lincoln led Lt. Gov. Bill Halter 43.6 percent to 42.2. percent. Businessman D.C. Morrison had 14.2 percent.
To avoid a runoff, a candidate would need at least one vote more than 50 percent.