South Korean opposition lawmaker Lee Jae-myung won the primary to be the Democratic Party’s (DP) presidential nominee in a landslide vote on Sunday, setting him up as the clear favorite to become the country’s next leader.

But while the progressive politician has a long track record of promoting engagement with North Korea, his recent pivot toward the political center and his lack of focus on inter-Korean issues while campaigning raise questions about how much he will prioritize improving relations with Pyongyang before and after the June 3 presidential election.

Lee took an overwhelming 89.8% of the ballots in the DP’s