Pennsylvania Governor Tom Wolf said the audit was unnecessary because the committee in charge has "no expertise or role in election administration."
The auditors said the decisions made relating to Trump "would effectively allow the platform to be weaponized."
"We are making changes—not for financial reasons or advertiser pressure, but because it is the right thing to do," the Facebook chief operating officer said.
Vermont Senator Bernie Sanders has been compared to President Donald Trump for failing to release his full tax returns, but he said he will by April 15.
"Mr. Neal wants to screw with the president," the Republican lawmaker said, siding with Team Trump.
The leaked tax return suggests the president needs a tax shelter, fast.
GOP vice presidential nominee defends Trump and criticizes Clintons' wealth.
"I'm under audit, too," Buffett said at a rally for Hillary Clinton. "I would be delighted to meet him anyplace, anytime, before the election. I'll bring my tax return, he can bring his tax return."
Seven have been charged in alleged bribery scheme involving a former General Assembly president.
The charities have come under intense scrutiny this year with Hillary Clinton running for president.
GAO says IRS conducted just three church audits from 2013 to 2014.