The Cory Booker juggernaut shows no signs of slowing down, and he's increasingly looking like a shoo-in to become New Jersey's next senator.

A new Quinnipiac poll shows Booker continues to lead by more than 30 points in next week's Democratic primary. He takes 54 percent of the vote, compared to 17 percent for Rep. Frank Pallone and 15 percent for Rep. Rush Holt. State Asssembly Speaker Sheila Oliver is at 5 percent.

The lead is essentially unchanged from all other polling of the race and reflects the inability -- and also unwillingness -- of Booker's opponents to go after him during their two-month campaign.

Over the weekend, Holt launched the first negative TV ad against Booker. Monday's debate between the four candidates -- the first featuring all four -- appeared to have little impact on the front-runner.

In the GOP primary, former gubernatorial candidate Steve Lonegan is set to win the nomination to face Booker; he leads Dr. Alieta Eck 74-10.

But Lonegan has his work cut out for him in the Oct. 16 general election. Current polls show Booker leading 54-29.