Falk mostly avoided attacking Barrett during the primary campaign, as Democrats across the state stressed the importance of party unity in the fight against Walker. The pressure to remain positive made it difficult for Falk to gain ground on Barrett, who entered the race with higher name recognition because of his 2010 bid.
Two lesser-known candidates also sought the nomination but were never considered a threat to win the primary. State Sen. Kathleen Vinehout finished with 4 percent, while Wisconsin Secretary of State Doug La Follette received 3 percent.
Walker and Barrett have less than a month to sway voters in the highly polarized state before the June 5 general election. The two campaigns, as well as many outside groups on both sides, will flood the state with paid media over the next four weeks.