"A rational observer may have brushed off Trump’s tweets as hyperbole, but Mr. Sayoc took them to heart," his attorneys wrote.
Authorities said the student's parents were on a flight to his city when he called in an anonymous tip.
Classes were dismissed for the day, and police conducted a search of the school.
The network’s Don Lemon was on the air when the threat was called in, but the show was stopped as the building was evacuated.
Eric Krieg, a right-wing blogger from Indiana, admitted to mailing a pipe bomb to an attorney who had filed a defamation lawsuit against him.
Police said the suspect told employees at Willie's Chicken Shack, “Y’all about to close right now because I’m going to get a bomb and blow this place up.”
Package intercepted four days after president called the billionaire Democratic activist a "crazed and stumbling lunatic."
Rivera says his conspiracy theory was a bigger mistake than the time he opened Al Capone's empty vault.
It used to be all fun and games, this Florida Man stuff.
"The president’s going to continue to fight back," the White House press secretary said when asked about the language Trump has used for his political enemies.
But fewer than one-quarter say he discourages his supporters from acting violently.
The senator, who was one of many prominent Democrats sent a pipe bomb last week, condemned Saturday's shooting in Pittsburgh.
The network said the package was "similar" to those allegedly sent by Cesar Sayoc to high-profile Dems.
"Fake News Must End!" the president tweeted amid bipartisan calls for him to tone down his rhetoric.
Despite rhetoric that potentially drives supporters to send bombs in the mail, the president insists "they" just don't want him to have one.
The president went after the Democratic donor, once again bucking calls to tone down his rhetoric in the wake of violence.
Or maybe not, he tells Jeanine Pirro on Fox News.
"It's basically the white supremacists, the white foot soldiers that he wants to follow and lead," former boss Debra Gureghian said. "He wanted to be a leader."
One Trump rally attendee repeated a "false flag" conspiracy theory to MSNBC, even though a suspect was arrested earlier in the day.
The first lady said to #ChooseKind after authorities detained suspected mail bomber Cesar Sayoc, who was allegedly inspired by the president's violent rhetoric.