Add Bill Kristol to the growing list of conservatives who are calling Mitt Romney to immediately release more of his tax returns.
The political analyst said on Fox News Sunday that the presumptive Republican presidential nominee should make the documents public tomorrow.
"It's crazy," Kristol said. "You gotta release six, eight, 10 years of back tax returns. Take the hit for a day or two."
Democrats say Romney—whose wealth is estimated at $250 million—may have something to hide and that he could be taking advantage of tax loopholes.
In January, Romney released his 2010 tax filing, and he says he'll release the 2011 documents before Election Day. However, he insists he won't release any more tax returns besides the ones for those two years.
The calls for Romney to release more information have been intensifying since recent Vanity Fair and AP reports detailed Romney's offshore holdings in countries such as the Cayman Islands, Bermuda and Switzerland.
Alabama's Republican governor, Robert Bentley, also said Romney should disclose more tax information.
"If you have things to hide, then maybe you're doing things wrong," the AP quoted him saying at the National Governors Association on Saturday. "I think you ought to be willing to release everything to the American people."
Former Mississippi Governor Haley Barbour and Republican strategist Ana Navarro have also said Romney should release his returns.
Romney told CNN earlier this week "We're putting out what is required plus more that is not required. And those are the two years that people are going to have. And that's, that's all that's necessary for people to understanding something about my finances."