Most voters say they already know everything they need to about President Obama and Mitt Romney, but some questions still linger about Romney's political and business record, according to a Pew Research Center poll released Tuesday.

Nine in 10 registered voters said they "already pretty much know what they need to know about" Obama, while 69 percent said the same of Romney.

Republicans were most likely overall to have questions about Romney, with 34 percent saying they needed to learn more about him, compared to 29 percent of independents and 21 percent of Democrats. But Democrats were far more interested than Republicans in Romney's taxes, by a 56-to-18 percent margin, and were more interested in his wealth and record at Bain, by 17 and 15 points respectively. Independents fell somewhere in the middle, with about a third wanting to hear more about Romney's Bain record and taxes, and a fifth wanting to know more about his wealth.

Although Romney has largely avoided talking about his faith on the campaign trail, his religious and personal history garnered the least curiosity. Only 16 percent of voters said they would like to learn more about Romney's religious beliefs, and only 19 percent said they wanted to know more about his family and upbringing. Instead, voters' questions focused on Romney's record, with 41 percent interested in his tenure as Massachusetts governor. Approximately a third had questions about his time as CEO of Bain Capital, as well as his unreleased income tax returns, both subjects on which Romney has drawn fire from the Obama campaign.

The Pew survey interviewed 798 registered voters between July 19 and July 22. The survey had a 4 percent margin of error.

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  • Ron Paul

    "Politically, I think that would help him," Paul said in a interview with <a href="" target="_hplink">Politico</a>. "In the scheme of things politically, you know, it looks like releasing tax returns is what the people want."

  • Richard Lugar

    "I have no idea on why he has restricted the number to this point," <a href="" target="_hplink">Lugar said</a>.

  • George Will

    "I don't know why... he didn't get all of this out and tidy up some of his offshore accounts and all the rest," Will said on ABC's "<a href="" target="_hplink">This Week</a>." "He's done nothing illegal, nothing unseemly, nothing improper, but lots that's impolitic."

  • Bill Kristol

    "He should release the tax returns tomorrow. It's crazy," Kristol said on "<a href="" target="_hplink">Fox News Sunday</a>." "You gotta release six, eight, 10 years of back tax returns. Take the hit for a day or two."

  • Robert Bentley

    "I just believe in total transparency," Bentley told <a href="" target="_hplink">ABC News</a>. "In fact, I was asked today that question -- do you think that Governor Romney should release his tax returns? And I said I do. I said, I release my tax returns. I may be the only public official in Alabama that does, but I release mine every year and I just believe that people should release their tax returns. And if you get them out and just get past that, it just makes it so much easier."

  • Haley Barbour

    When asked on "<a href="" target="_hplink">The Situation Room</a>" if Romney should release more returns, Barbour said, "I would. But should it be an issue in the campaign? I don't think it amounts to diddly."

  • Michael Steele

    "If there's nothing there, there's no 'there' there, don't create a there,'" Steele said on MSNBC.

  • David Frum

    "Tax returns the next problem. Releasing returns under pressure: more weakness, more pain," Frum <a href="" target="_hplink">tweeted</a>.