The IRS has engaged in all sorts of political abuse. From Ron Paul at ronpaulinstitute.org:
Last week the New York Times published some of President Trump’s 1980s and 1990s tax returns information. The information detailed President Trump’s financial difficulties during that time. While you would not know it from reading some media reports, this is old news. In fact, President Trump openly discussed his financial difficulties on his popular reality television show.
What should be of great concern is the possibility that the person who leaked the returns — who the paper says has legal access to President Trump’s tax records — is an IRS employee seeking to undermine the president. This would hardly be the first time an IRS employee has leaked confidential information because he disagreed with the taxpayer’s politics. In 2014 the agency had to pay the National Organization for Marriage 50,000 dollars after an IRS employee gave names of the group’s donors to the group’s opponents.
In 2014-2017, my Campaign for Liberty group was repeatedly threatened by the IRS because it refused to give the agency the names of and other information about its top supporters. Fortunately, the IRS rescinded the regulation forcing groups like Campaign for Liberty to violate supporters’ privacy or face legal penalties. However, campaign finance reform legislation that recently passed in the House of Representatives would require the IRS to resume collecting this information, and the New York attorney general is suing the IRS to force the agency to reinstate the regulation.
The right of groups like Campaign for Liberty to protect their supporters’ privacy was upheld by the Supreme Court in NAACP v. Alabama. As Justice John Marshall Harlan wrote, “Inviolability of privacy in group association may in many circumstances be indispensable to preservation of freedom of association, particularly where a group espouses dissident beliefs.”