President Donald Trump on Thursday sought to ramp up investigations of unnamed groups his administration suspects of supporting political violence, signing a presidential memorandum that critics worry will be used to target his political enemies. The directive aims to intensify efforts across the government to identify organizations backing what officials called "domestic terrorism" and organised political violence being perpetrated by radical, politically motivated groups” in the wake of the killing of conservative activist Charlie Kirk earlier this month. Asked what other groups the administration might target under Thursday’s memo, Trump and other officials would not identify any specific organizations. But Trump did later single out prominent liberal donors George Soros and Reid Hoffman as people he's "hearing" about, remarks that are likely to intensify fears the memorandum will be used to investigate Trump's political opponents. This comes after President Trump heavily criticised the "radical left" following Charlie Kirk's murder and the Dallas ICE Facility shooting that claimed one life.