Piers Morgan: Trump can't ignore stickers on suspect's van, must cool down 'violently aggressive rhetoric'

British commentator Piers Morgan on Friday said President TrumpDonald John TrumpFacebook releases audit on conservative bias claims Harry Reid: 'Decriminalizing border crossings is not something that should be at the top of the list' Recessions happen when presidents overlook key problems MORE can’t ignore the pro-Trump stickers on the van of the suspected bomb mailer, saying the president must “cool down” his own rhetoric.

A Florida man was arrested Friday in connection with explosive packages mailed to prominent Democrats and CNN this week.

The suspect’s van was removed by law enforcement after his arrest in Plantation, Fla.

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Stickers on the van indicated support for Trump alongside images of prominent Democrats with gun sight targets on their faces and phrases like “CNN SUCKS” and “dishonest media.”

“The pipe bomber suspect's van is emblazoned with sinister targets over Trump opponents - some of whom received the bombs,” Morgan tweeted shortly after the suspect’s arrest. “He's obviously a lunatic, but lunatics get triggered.”

“The President can't ignore this, he MUST cool down his often violently aggressive rhetoric,” Morgan added.

Trump on Friday pledged to bring those responsible to “swift and certain justice.”

"We must never allow political violence to take root in America and I am committed to doing everything in my power to stop it and to stop it now," he said.

The president's comments follow his earlier remark that the bomb scare will halt Republican “momentum” going into the Nov. 6 midterm elections.

Trump also accused the media of “blaming” him for the explosive packages.

Cesar Sayoc Jr. was identified by several media outlets, citing law enforcement officials, as the suspect taken into custody. Sayoc is a registered Republican with a criminal record that includes felony theft, drug and fraud charges dating back to 1991.

Public records show he was once arrested and accused of threatening to use a bomb.

Law enforcement this week intercepted packages addressed to the residences of former Secretary of State Hillary ClintonHillary Diane Rodham ClintonThe exhaustion of Democrats' anti-Trump delusions Poll: Trump trails three Democrats by 10 points in Colorado Soft levels of support mark this year's Democratic primary MORE, former President Obama and former Vice President Joe BidenJoe BidenHarry Reid: 'Decriminalizing border crossings is not something that should be at the top of the list' Warren offers plan to repeal 1994 crime law authored by Biden Panel: Jill Biden's campaign message MORE.

Other packages were addressed to Democratic Reps. Debbie Wasserman SchultzDeborah (Debbie) Wasserman SchultzParkland father: Twitter did not suspend users who harassed me using name of daughter's killer Hillicon Valley: Senate Intel releases election security report | GOP blocks votes on election security bills | Gabbard sues Google over alleged censorship | Barr meets state AGs on tech antitrust concerns House committee leader questions Trump on efforts to secure elections MORE (Fla.) and Maxine WatersMaxine Moore WatersF-bombs away: Why lawmakers are cursing now more than ever Banks give Congress, New York AG documents related to Russians who may have dealt with Trump: report Maxine Waters: Force us to ban assault weapons 'or kick our a--- out of Congress!' MORE (Calif.), Sens. Kamala HarrisKamala Devi HarrisHarry Reid: 'Decriminalizing border crossings is not something that should be at the top of the list' Warren offers plan to repeal 1994 crime law authored by Biden Sanders leads Democratic field in Colorado poll MORE (D-Calif) and Cory BookerCory Anthony BookerCastro qualifies for next Democratic primary debates Eight Democratic presidential hopefuls to appear in CNN climate town hall Biden, Buttigieg bypassing Democratic delegate meeting: report MORE (D-N.J.), former Director of National Intelligence James ClapperJames Robert ClapperEx-CIA chief worries campaigns falling short on cybersecurity Former DHS, intelligence leaders launch group to protect presidential campaigns from foreign interference Senate braces for brawl over Trump's spy chief MORE and former CIA Director John BrennanJohn Owen BrennanWebb: Questions for Robert Mueller A brief timeline of Trump's clashes with intelligence director Dan Coats Trump critic Brennan praises his Iran decision: I 'applaud' him MORE, the latter two of whom served during the Obama administration.

No deaths or injuries have been associated with the bombs, which did not detonate.

No charges have been filed, but a spokeswoman for the Justice Department said a press conference will be held this afternoon to discuss the matter further.