IRS staffers used “inappropriate criteria” to single out Tea Party groups, while senior agency officials ineffectively managed the situation, according to a federal watchdog report.

The agency, the report found, asked for a range of “unnecessary information” from groups seeking tax-exempt status – including donors, all of the issues important to that organization and the political affiliations and aspirations of group leaders.

The highly-anticipated report from Treasury’s inspector general for tax administration adds that the agency identified groups for further scrutiny based on their names and policy positions – like “Tea Party” or “9/12” – instead of based on the tax law and regulations.