(CNN) - A conservative Super PAC is questioning Michael Bloomberg's new TV spot that supports New Jersey Senate hopeful Cory Booker and touts the Newark mayor's education achievements.
The American Commitment Action Fund says it's spending $130,000 to run an ad that will air across the Garden State, accusing Booker of failing Newark's schools despite a $100 million donation from Facebook founder Mark Zuckerburg to help improve the schools.
The new commercial, which the group says will start running Wednesday, claims that Booker, the two-term Democratic mayor of Newark, used millions of dollars of the money for focus groups and polls while none went to city classrooms.
Bloomberg, the multibillionaire and independent three-term mayor of New York City, earlier this week announced a $1 million ad buy in support of Booker, to put up a spot through his Independence USA PAC that touts Booker's efforts to reform Newark's schools.
The Action Fund quickly fired back.
"Cory Booker's record of failing Newark and its students can't be concealed by a $1 Million misleading ad buy," Action Fund founder Phil Kerpen said in a release.
A new poll released Wednesday indicates Booker leading Republican nominee Steve Lonegan by 12 percentage points in the run up to next week's special Senate election. Booker had larger leads in surveys conducted in August and early September. The winner of the contest will fill out the remainder of the term of the the late Democratic Sen. Frank Lautenberg.
In a statement, Booker's campaign called the Action Fund ad "deeply misleading."
"Working with Governor Christie, Newark Public Schools, the New Jersey Department of Education and the Newark Charter School Fund, Mayor Booker moved aggressively on a school transformation agenda," said Deputy Communications Director Silvia Alvarez
"The changes have resulted in an increase in graduation rates of more than 7 percent since 2010 – the highest increase among the state's largest school districts."
Meanwhile, the Lonegan campaign says it's spending more than $150,000 to run a new ad statewide that ties Booker to President Barack Obama.
"Cory Booker supports Obamacare and Obama's trillion dollar tax hike," claims the narrator in the spot.
Last week a Booker campaign TV commercial included a clip of Lonegan describing himself as a "right wing radical."