(CNN) - New Jersey Gov. Chris Christie, one of Mitt Romney's most popular and visible surrogates, said Wednesday the Republican presidential candidate and former Massachusetts governor should release his tax returns as soon as they're available.
"I would say if you have tax returns to put out, you know, you should put them out sooner rather than later because it's always better in my view to have complete disclosure, especially as the front-runner," Christie said on NBC's Today Show.
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On Tuesday, Romney said he would release his tax returns in April, after the Internal Revenue Service's tax filing deadline. He said that would provide the most up-to-date information for voters.
"The most relevant information is the most recent," Christie said in the interview Wednesday. "He'll release when he files in April. That's going to be up to him."
He added that he made a habit of releasing his own tax information annually.
"My practice all along is I release my tax returns every year as soon as they are filed," Christie said.
At his media availability Tuesday, Romney also said he "probably" paid a tax rate of 15%, since his income is derived mostly from investments and not a salary.