WASHINGTON — Democrats are unhappy that newly revealed Internal Revenue Service documents show the agency screened for progressive groups seeking tax-exempt status, not just the tea party organizations for which the IRS was already under fire.

Democrats also want to know why the Treasury Department inspector general who investigated IRS targeting of conservative groups didn’t mention that terms like “Progressives” and “Healthcare legislation” were on the same lists agency workers used to find applications to review closely.

“The Inspector General seriously erred in not making clear in both the audit report and his testimony on this matter that ‘Tea Party’ and ‘Progressives’ were included” in the lists IRS workers used to screen applications, Rep. Sander Levin, D-Mich., wrote Monday in a memo his aides distributed. Levin is the top Democrat on the House Ways and Means Committee.

That Treasury investigator, J. Russell George, released a report in May detailing “inappropriate criteria” the IRS used to single out conservative groups for intensified treatment, and has testified to congressional committees several times. He never affirmed that progressive groups were sought out as well, although he cautioned lawmakers that he recently had found lists that raised concerns about other “political factors” he did not specify.

Levin’s complaint came hours after Danny Werfel, the new IRS chief, told reporters that his agency’s screening of groups seeking tax-exempt status was broader and lasted longer than has been previously disclosed.