Federal Bureau of Investigation agents arrested Sayoc at an AutoZone parking lot in Plantation, Florida, about six miles west of Fort Lauderdale, Friday morning as he was nearing his white van, which has been covered with images political in nature, including images of notable liberals such as Hillary Clinton and former President Barack Obama.
A federal law enforcement source said charges would likely be brought by federal prosecutors in Manhattan and Sayoc transferred to New York City.
None of them detonated, but investigators said they could have been risky "if subjected to the right combination of heat or shock or friction".
Trump told reporters Friday afternoon that he was aware that the suspect was a supporter of his, but that he bore "no blame" for his actions.
After the arrest was made, Trump denounced such "terrorizing acts", saying they have no place in the United States. "We will not tolerate such lawlessness, especially not political violence", said Sessions.
In this undated photo released by the Broward County Sheriff's office, Cesar Sayoc is seen in a booking photo, in Miami.
"We will prosecute them, him, her, whoever it may be to the fullest extent of the law".
As Sayoc was taken into custody, investigators across the country continued to chase potential bombs.
Michael Moore was one of the faces shown with a target over it on suspected mail bomber Cesar Sayov's van and according to the filmmaker, Fox News is, in part, to blame.
FBI Director Christopher Wray, speaking at the same news conference, said at least 13 IEDs were sent in the packages, and each mailing included 6 inches of PVC pipe, a small clock and potentially explosive material.More news: Meghan's polka dot dress sells out in minutes
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Wray said a fingerprint found on one of the packages led investigators to Sayoc. Police records say the switcheroo netted Sayoc $568.
The most recent bomb connected to Sayoc was addressed to major Democratic donor Tom Steyer.
According to media reports, Sayoc has a long criminal record, including on charges of making a bomb threat.
No one was hurt by any of the bombs, which Wray confirmed were "not hoax devices".
On Friday, federal authorities arrested 56-year-old Florida resident Cesar Sayoc in connection with more than a dozen pipe bombs that were mailed to high-profile Democrats and prominent critics of President Donald Trump this week.
It is not clear what the motive was behind the packages, which came just two weeks before the midterm elections and all apparently targeted critics of the Trump administration.
According to the complaint, the windows of Sayoc's van were covered with images including critical of CNN. Debbie Wasserman Schultz, the former chairwoman of the Democratic National Committee.
Sayoc was charged with felony theft by swindle over $500 and possession, then released. In 2002, he was arrested for a bomb threat called in to power company Florida Power & Light.
Trump, who held back some of his usual name-calling at a rally in Wisconsin earlier this week, was back to his usual attack lines Friday evening even as he called for an end to the "politics of personal destruction". "I don't know, I heard he was a person who preferred me over others".
A device destined for former Attorney General Eric Holder was instead sent to former Democratic National Committee Chair Debbie Wasserman Schultz, whose office was listed as the return address on numerous packages. The case continued widening Friday even as Sayoc was detained, as investigators in California scrutinized a similar package sent to Democratic Sen.