Glenn Beck Under Investigation After Threatening to Stab Donald TrumpGlenn Beck is under investigation from the Secret Service after threatening to stab Donald Trump to death on his radio program, CBS reports. Friends Read FreeCopyFacebookXTruthGettrLinkedInTelegramEmailSavePolitical commentator Glenn Beck and GOP front-runner Donald Trump Gage Skidmore/WikicommonsBy Jonathan Zhou3/5/2016Updated: 3/5/2016Print