TRENTON - Gov. Chris Christie returns to New Jersey after campaigning for Republicans to decide whether to scrap a new commuter rail tunnel into Manhattan.

Christie told reporters in Illinois on Tuesday that he plans to meet with his transit team today to review the revised federal cost estimates for the tunnel, which is expected to see cost overruns.

"I was alerted to the fact that there was potential for significant cost overruns, and New Jersey's broke," said Christie in Illinois. "The federal government made it clear that New Jersey will be on the hook for any cost overruns on the project."

A decision on the project's future could come at the end of the week.

The Republican governor halted new work on the tunnel for 30 days while the review was being done.

Christie says he won't go ahead with the $8.7 billion project unless New Jersey has a way to pay for it.

AP wire services contributed to this report.