Democrat Cory Booker has the strongest name recognition among the six candidates running in the special New Jersey Senate primary.

A Quinnipiac University poll released Tuesday shows 56 percent of New Jersey voters surveyed have a favorable opinion of the Newark mayor. Twenty-seven percent said they don't know enough about Booker to form an opinion.

Among the other Democrats, 71 percent said they don't know enough about Assembly Speaker Sheila Oliver. Sixty-eight percent didn't know enough about Rep. Rush Holt and 63 percent said the same about Rep. Frank Pallone.

"Political observers wondered why Congressmen Frank Pallone and Rush Holt didn't make a deal for one of them to step out and throw his support to the other," said Maurice Carroll, director of the Quinnipiac University Polling Institute. "These results show that probably wouldn't help. Pallone's and Rush's combined total in the Democratic primary still trails Booker's tally almost 3-1."

Fifty-four percent of the voters questioned didn't know enough about Republican Steve Lonegan compared to 91 percent for his opponent, Alieta Eck.

"It looks as if the speculation was right: Newark Mayor Cory Booker seems to be a shoo-in for the U.S. Senate," Carroll said.

The survey of 1,068 New Jersey voters has a sampling error of plus or minus 3 percentage points.