Story highlights Harry Reid says he's stunned Mitt Romney has 'the gall' to demand Donald Trump's tax returns

In 2012, it was Reid pressing Republican nominee Romney to release his taxes

Washington (CNN) Senate Minority Leader Harry Reid says he's stunned to see 2012 Republican presidential nominee Mitt Romney demanding Donald Trump's tax returns.

"All I know, I can't imagine Romney having the gall coming after anybody's returns. Let's look at his," Reid told CNN on Thursday.

Romney launched an ironic attack on Trump during an appearance on Fox News on Wednesday, saying he believes there's a "bombshell" in Trump's tax returns.

Four years ago, it was Reid making similar claims about Romney.

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