Cesar Sayoc, a former male stripper, pizza delivery driver and disc jockey who lived in a white van festooned with right-wing political images supporting Trump and lambasting his critics, faces a maximum penalty of 48 years in prison.
CNN was referring to President Donald Trump's aggressive rhetoric against illegal immigration, sending troops to the border, and warning of the consequences of Democratic victories in the 2018 elections.
U.S. attorney for the Southern District of NY wrote in a letter to U.S. Magistrate Judge Robert Lehrburger that "the evidence gathered to date demonstrates the dangerousness of the defendant and creates significant incentives for him to flee".
Sayoc last week waived a similar hearing in Miami near where he was captured on October 26.
None of the bombs exploded before being intercepted and no one was injured.
Sayoc made his first court appearance on Tuesday in federal court in Manhattan following his transfer from Florida, where he was arrested last month. Court documents indicate he is charged with transporting explosives across state lines, illegally mailing explosives, threatening former presidents and others, threatening interstate communications and assaulting federal officials.More news: Six arrested after London fire disaster effigy torched
Assistant U.S. Attorney Jane Kim, said he posed "a serious risk of danger to the public" and described him as "a flight risk".
His lawyer has questioned the evidence in the case. Kamala Harris and New Jersey Sen.
Sayoc was being transferred from federal custody in Florida and was expected to arrive in NY ahead of a Tuesday court hearing.
Though she has been estranged from Cesar Sayoc for several years, she said she believes he has been mentally ill "for a long time", making him especially susceptible to the president's frequent anti-media and anti-Democrat remarks. Cory Booker. Packages were also mailed to CNN in NY and Atlanta.
"Although the Government's investigation is ongoing, the evidence gathered to date demonstrates the dangerousness of the defendant and creates significant incentives for him to flee", prosecutors wrote.