President Donald Trump speaks to the media on the South Lawn of the White House on September 11. Mehmet/Middle East Images/AFP/Getty Images

Hundreds of nonprofit groups, most of them left-leaning, are joining together to urge President Donald Trump to end what they call the “unjustified” targeting of liberal organizations following the assassination of conservative activist Charlie Kirk .

In an open letter issued Thursday and shared first with CNN, more than 500 groups condemned what they described as the use of government power to threaten their First Amendment rights. Organizations signing the letter ranged from the American Civil Liberties Union and Indivisible to Greenpeace USA and the Service Employees International Union.

Trump and others in his administration have invoked Kir

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