President Donald Trump and members of his administration have intensified threats to crack down on what they call the “radical left” in the aftermath of conservative activist Charlie Kirk’s assassination, prompting critics to warn the government may be using the killing to justify efforts to suppress political opposition.

The White House and senior aides have discussed classifying some organizations as domestic terrorist entities, pursuing racketeering investigations and revoking tax-exempt status for progressive nonprofits. Officials pointed to groups including Indivisible and the Open Society Foundations as potential subjects of scrutiny, while insisting the measures are intended to prevent and punish violence.

Authorities said they believe the suspect in Kirk’s assassination acted alone and charged him with murder. Administration officials, however, have repeatedly made broader statements calling for expanded investigations and punishments tied to the killing. "The radical left has done tremendous damage to the country," Trump told reporters as he departed for a state visit to the United Kingdom. "But we’re fixing it."

Attorney General Pam Bondi blamed “left-wing radicals” for the shooting and said they “will be held accountable.” Stephen Miller, a top policy adviser, told Vice President J.D. Vance, who guest-hosted Kirk’s show from his White House office, that there was an "organized campaign that led to this assassination," and vowed to "uproot and dismantle these terrorist networks" using "every resource we have."

White House spokeswoman Abigail Jackson rejected Democratic criticism that the administration’s posture targeted political speech, saying the goal was to "target those committing criminal acts and hold them accountable." Administration officials cited demonstrations in which officers and federal agents were injured and the distribution of protective gear at protests as examples of conduct they say warrants scrutiny.

Progressive groups and free-speech advocates have said the moves amount to an escalation of a long-running campaign by Trump to use governmental power against his critics. Indivisible’s leadership said it condemns political violence and has itself faced threats, while the Open Society Foundations called it "disgraceful to use this tragedy for political ends to dangerously divide Americans and attack the First Amendment."

Legal proposals and congressional activity have followed. Sen. Ted Cruz of Texas and other Republicans have proposed legislation to allow the Justice Department to use racketeering laws, traditionally applied to organized crime, against violent protesters and supporting groups. Rep. Chip Roy of Texas called for a House special committee to investigate nonprofit organizations he described as behind "coordinated anti-American assaults." Trump also ordered an investigation into ActBlue, a major liberal fundraising platform, and has repeatedly criticized financier George Soros, calling for a racketeering probe without making specific allegations.

Nonprofit leaders and legal experts said the talk of revoking tax-exempt status and expanding criminal probes has already changed behavior in the sector. Some groups have hired lawyers and increased security for staff and offices amid fears of being unjustly targeted. "It’s a heightened atmosphere in the wake of political violence, and organizations who fear they might be unjustly targeted in its wake are making sure that they are ready," said Lisa Gilbert, co-president of the watchdog Public Citizen.

Democrats and civil-liberties advocates warned that the rhetoric risks chilling constitutionally protected speech and association. Sen. Chris Murphy of Connecticut said the murder could have united Americans against political violence but that the administration appears to be preparing "a campaign to destroy dissent." Ezra Levin, co-executive director of Indivisible, accused Trump of shrugging at right-wing violence while weaponizing state power against opponents.

Supporters of tougher action have welcomed the White House stance. Some conservative commentators and activists urged a harsh response to the left, and some Republicans in Congress signaled openness to new enforcement tools. Katie Miller, a former administration spokeswoman, asked Bondi whether there would be "more law enforcement going after these groups" and "putting cuffs on people." Bondi replied that authorities would target hate speech that crosses into threats of violence.

Legal scholars cautioned that many forms of controversial or hateful speech remain protected under the First Amendment, and that applying statutes like the Racketeer Influenced and Corrupt Organizations Act to political groups raises complex legal and constitutional questions. Past attempts by the Trump administration to limit nonprofit activities or federal funding for certain organizations have often failed to produce sweeping policy changes, though the threat of such measures has affected donors and institutions.

The episode unfolds against the backdrop of Trump’s broader approach to political opponents since returning to the White House, including pardons for some Jan. 6 defendants and public attacks on institutions perceived as adversaries. Critics said the current rhetoric risks further polarizing the country and could influence the political environment ahead of next year’s midterm elections, which will determine control of Congress and many state offices.

Administration officials say their priority is preventing violence and holding criminals accountable. Critics say that without clear links between organizations and illegal acts, the initiatives risk eroding civil liberties and narrowing the space for political dissent. As calls for investigations and heightened enforcement move forward, nonprofits and advocacy groups said they are preparing for increased scrutiny while legal and constitutional battles over the proper limits of government power are likely to follow.