Former Virginia Attorney General Robert McDonnell has broadened his lead against each of the three Democrats vying to oppose him in the race for governor, a new Rasmussen Reports poll suggests.

Though both sides dismissed the results as just one, early poll, the lead highlights a sobering challenge for the victor in the June 9 Democratic primary. McDonnell, the presumptive Republican nominee, now holds a 10-point advantage over his closest competitor, former Del. Brian Moran. A similar Rasmussen survey in February showed McDonnell with a three-point lead over Moran.