Four officials familiar with the investigation identified the man to The Associated Press.
Trump called for an "end to the politics of personal destruction", noting that in that quest, "the media has a major role to play, whether they want to or not".
Sayoc filed for chapter 7 bankruptcy in 2012, informing the court he had $4,175 in personal property and more than $21,000 in debts.
According to the Florida Department of Law Enforcement, Sayoc has been arrested for both grand larceny and petty larceny in the early 90s.
Sayoc, an amateur body builder who 16 years earlier was on probation for a bomb threat charge, has social media accounts that vilify Democrats and praise the president.
In 2004, the 56-year-old was arrested on multiple charges including fraud and drug possession.
"It would be reckless and unsafe for President Trump to continue his rhetorical assaults on the press and branding of journalists as enemies of the people after this spate of package bombs aimed at political figures and CNN", CPJ Deputy Executive Director Robert Mahoney. His van was taken away by the Federal Bureau of Investigation this morning, and it is completely covered in pro-Trump stickers.
The FBI said a package, "similar in appearance to the others" found this week, was addressed to Booker and located in Florida.
In addition to Steyer, the intended recipients of packages discovered on Friday included Democratic US Senator Cory Booker of New Jersey, former US Director of National Intelligence James Clapper and Democratic US Senator Kamala Harris of California.
He also noted that he will not contact former US President Barack Obama or any of the other people targeted by the bomber, saying he "will probably pass". At the time, Sayoc said he lived with his mother in Aventura, Florida, and listed a $1,150 tax refund and a 2001 Chevy Tahoe vehicle as his only assets. An earlier package had been sent to former Obama CIA Director John Brennan via CNN in NY.
Justice Department public affairs director Sarah Isgur Flores confirmed a person was taken into custody Friday. "We will bring them to justice".
He said: "There is no blame".
Investigators were analyzing the innards of the crude devices to reveal whether they were meant to detonate or simply sow fear just before Election Day. But they were uncertain whether the devices were poorly designed or never meant to cause physical harm. One addressed to U.S. Sen.
Most of those targeted were past or present USA officials, but one was sent to actor Robert De Niro and billionaire George Soros.
A 12th package, identified by police as a pipe bomb similar to others found across the country, was found at a US Post Office in Manhattan and the bomb squad were dispatched, NY police said. Posted under the headline "The Swamp to Be Drained!" were images of the Clintons, Barack Obama, Debbie Wasserman Schultz, Eric Holder, and Maxine Waters.
Former Democratic National Committee Rep.
He condemned the mailed bombs.
Cesar Sayoc allegedly placed 13 improvised explosive devices in envelopes and addressed them to political figures across the United States, prosecutors said.
Wray declined to say if Sayoc is cooperating with investigators.
New York Police stand outside the Time Warner Center at Columbus Circle, Wednesday, Oct. 24, 2018 in New York. One was intercepted in New York City at a postal facility.
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