Why is Albio Sires the front runner?

65% of the registered voters in the 13th district live in Hudson County, where Assembly Speaker Albio Sires, the Mayor of West New York, has the support of the powerful Hudson County Democratic machine; Middlesex County, where Assemblyman/Perth Amboy Mayor Joseph Vas lives, makes up 13% of the district. 16% is in Essex and 6% in Union. In the 2004, 80% of the votes cast in the Democratic primary for Congress came from Hudson County, while only 4% came from Middlesex. Essex County Democrats say they expect their organization line to go to Sires. To become competitive, Vas will need to win the line in Union County (aka the endorsement of State Senator Raymond Lesniak) and will need to hope that Sires’ Hudson County base becomes diluted by a multitude of other candidates.

Why is Albio Sires the front runner?