The Internal Revenue Service is being sued after admitting the agency targeted conservative groups, including the Tea Party, for invasive questioning when applying for tax exempt status.
The American Center for Law and Justice claims to represent more than two dozen organizations, not just various Tea Party groups.
"The idea that the government acknowledged the targeting and apologized for it, doesn't solve the problem," said ACLJ chief counsel Jay Seklulow.
Seklulow, appearing on the Herman Cain Show on WSB, indicated that the filing of court papers on Wednesday will allow him to take "many depositions in what will be a very big lawsuit."
"It’s more than just Lois Lerner, these revenue agents and the lawyers at Treasury ... I think it goes much higher," said Sekulow.
At least two congressional panels are planning more hearings next week on the IRS targeting of conservative groups.
When Congress returns from a weeklong recess on Monday, Danny Werfel is scheduled to appear before a House Appropriations subcommittee in his first congressional testimony since becoming acting IRS commissioner last week. Also appearing will be J. Russell George, the Treasury Department inspector general whose report detailed the IRS tactics.