Article continues below advertisementDid Donald Trump forget where he was for a second? The president's facial expressions at Charlie Kirk's memorial service are being mocked online after videos went viral of him hugging the late right-wing political activist's wife, Erika Kirk, at the stadium event in Arizona.On Sunday, September 21, President Trump delivered a speech behind bulletproof glass while on stage at State Farm Arena for a remembrance ceremony held in honor of Charlie - who was assassinated on Wednesday, September 10, while speaking at Utah Valley University.