Gov. Christie is heading back to Iowa.

After visiting the key presidential nominating state four times in recent months as chairman of the Republican Governors Association, Christie will return on Jan. 24 in Des Moines to speak at a conservative summit, according to the event's organizers.

The Iowa Freedom Summit, sponsored by Citizens United and U.S. Rep. Steve King, will also feature former vice-presidential nominee Sarah Palin, former House Speaker Newt Gingrich, and former presidential candidate Rick Santorum.

Christie says he'll decide early next year whether to run for president in 2016. Other possible GOP candidates who will speak at the summit are U.S. Sen. Ted Cruz of Texas, former Arkansas Gov. Mike Huckabee, and neurosurgeon Ben Carson.

It was unclear how Christie's trip would be funded. Representatives of the governor didn't respond to requests for comment.

Previous trips to help raise money for Iowa Gov. Terry Branstad's successful reelection campaign were covered by the RGA.