IRS workers' union joins lawsuit targeting Trump's 'Anti-Weaponization Fund'

The suit also seeks to block a settlement shielding Trump from past tax audits.

A union that represents Treasury Department and IRS employees has joined in a lawsuit previously brought to block the Trump administration's now-defunct "Anti-Weaponization Fund," and is now seeking to block the separate settlement that extends immunity to President Donald Trump and members of his family from past audits of their tax returns.

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