President Obama pledged Friday to work with Congress to prevent the Internal Revenue Service from abusing its power.
The president's vow comes just one day after announcing the early resignation of the acting IRS Commissioner Steven Miller.
Still, many Tea Party leaders and GOP lawmakers on Capitol Hill are calling for an investigation into the White House to see exactly who knew that conservative groups were being scrutinized by the IRS.
They've likened the targeting of political groups that oppose the president to a political witch hunt.
"This is very troubling because the axiom is, 'The power to tax is the power to destroy,'" Rep. Michele Bachmann, R-Minn., said.
"This is runaway government at its worst. Who knows who they'll target next?" Senate Minority Leader Mitch McConnell, R-Ky., charged.
Sen. Mike Lee, R-Utah, said, "This is an act of a political ruling class, regardless of political affiliation, targeting the American people."
Meanwhile, Diane Belson of Laurens County Tea Party suggested the scandal ought to raise serious questions about the wisdom of implementing Obamacare.
"When you think about Obamacare being implemented and 16,000 more people added to the IRS, are they going to be next determining who can get health care based on their political views?" she said.
The American Center for Law and Justice is representing more than a dozen Tea Party groups, many of them still waiting for IRS approval.
The ACLJ says it plans to sue because their clients lost members, donations, and missed the election cycle due to the agency's targeting of conservative groups.