State Rep. Scott R. Drury will stay on the crowded March 20 Democratic primary ballot for attorney general, the Illinois State Board of Elections voted Thursday morning.By a vote of 5-3, the board endorsed the written opinion of general counsel Kenneth R. Menzel, who recommended certifying Drury’s petition even though he filed a statement of economic interest for his role as state representative with his nominating petition for Illinois attorney general.“Today was a victory for democracy. We clearly complied …