(CNN) - Former President Bill Clinton said Friday that Mitt Romney's overseas financial investments are "relevant" to the 2012 presidential race.
"The public ought to know that and voters can make up their own mind about whether they think it's a good thing for a person who wants to be president to minimize his own tax liability by putting the money in overseas tax shelters," Clinton said on NBC's "Today."
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President Barack Obama's re-election campaign and national Democrats have been calling on Romney to release more than the two years' worth of tax documents he's already made public.
They claim the documents will answer questions about Romney's offshore investments, namely in places considered to be tax havens like the Cayman Islands, Bermuda and Switzerland.
Making his point on Friday, Clinton said Romney's wealth and background are just as "relevant" as his own record when he first ran for president in 1992.
"All your work life before you run for president is relevant," he said.
Romney's campaign has been pointing to the fact that it released the candidate's tax returns for 2010 and an estimate for 2011, in addition to financial disclosure documents required by federal election law.
Romney, whose worth is valued up to $256 million, said Wednesday he'll put out his most recent year of tax returns "as soon as that's prepared."
"The Democrats are always going to be critics. We have released all of the financial statements required by law and two years of tax returns," Romney said on Fox Business Network.
Others, defending the presumptive GOP presidential nominee, have called on Democrats to stop making an issue out of Romney's taxes.
"He's released everything that he's required to release including paying more than sixteen percent of his income to charitable giving," Rep. Jason Chaffetz of Utah, a Romney surrogate, said Tuesday on CNN. "Governor Romney's been very successful. Get over it."