So far, the list of political figures that the suspicious packages have been sent to includes The Clintons, The Obamas, billionaire George Soros, former Central Intelligence Agency director John Brennan, and Former Attorney General Eric Holder.
The package was misaddressed and returned to sender.
Officials say the device sent to his home was made from a length of pipe about six inches long filled with explosive powder.
President Trump added during times like this, we must come together as a nation.
The packages were "immediately identified during routine mail serving procedures", the Secret Service said in a statement Wednesday, and neither Clinton nor Obama received the packages with the explosive devices.
Her name, as well as Mr Brennan's, was misspelled on the CNN package. Another was found in a Los Angeles postal facility.
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The official says investigators believe the explosive is linked to one found Monday at the compound of liberal billionaire George Soros.
The Federal Bureau of Investigation was looking into the incident, police said.
Chappaqua police said authorities in New Castle assisted the FBI, the Secret Service and Westchester County police with the investigation into the package sent to Clinton.
What was in the packages?
A package containing a crude pipe bomb prompted the evacuation of CNN offices in Manhattan Wednesday morning.
Meanwhile, the network is reporting the device was removed from the building by police.
The FBI says that device along with some of the others was being transported to FBI headquarters in Quantico, Virginia to be analyzed and tested.
How have United States political figures responded?
With the country deeply polarised under President Donald Trump, the packages brought a new level of tension to political contests that will decide whether Democrats can challenge the majorities now held by Trump's Republicans in Congress.