Booker is seen favorably by 56 percent of all New Jersey voters, while 16 percent view him unfavorably and 27 percent register no opinion.
In the Republican race, the former Bogota mayor was the choice of 62 percent of primary voters, with 5 percent preferring physician Alieta Eck. Among GOP voters, 28 percent remain undecided ahead of the Aug. 13 primary.
Looking ahead to the Oct. 16 special election, Democrats remain heavily favored to regain the seat held by the late Sen. Frank Lautenberg (D-N.J.). Gov. Chris Christie has appointed Sen. Jeffrey Chiesa (R-N.J.) as Lautenberg's temporary replacement.
In hypothetical match-ups, Booker beats Lonegan 53-30 percent, while Pallone prevails 38-34 percent and Holt would beat the likely Republican nominee 37-36 percent.
“Steve Lonegan gets the bedrock Republican 30 percent, and not much more, against everyone,” Carroll said.
The poll of 1,068 voters carried a margin of error of 3 percentage points for general election survey questions, 4.9 percent on the Democratic primary questions, and 5.4 percent on the Republican primary queries.