The country’s historically disadvantaged north is set to decide the tight race for the first time.
If Yoon gets impeached or steps down after martial law saga, PM Han Duck-soo will step in as interim president.
Ricardo Bonilla is the second finance minister to depart Petro’s government, which faces legislative hurdles and probes.
The motion follows a bid on Monday to unseat the VP, who has become mired in a political power struggle with president.