The fifth grader, who attends Dr. Martin Muther King, Jr. School in Atlantic City, called the George W. Bush Presidential Library near Dallas, Texas earlier this week.
Breaking news and the stories that matter to your neighborhood.
The 10-year-old was not at school at the time of the call, sources say.
The Secret Service investigated the death threat and spoke to the child, but it does not expect to file any charges, sources told Greenberg.
Fan, follow and download: Get the latest from NBCPhiladelphia.com anytime, anywhere. Follow us on Twitter, Facebook and NBC Philadelphia. Sign up for our breaking news newsletter. And, get breaking news delivered right to your mobile phone -- just text PHIBREAKING to 639710 to sign up. (Message and data rates may apply.)