But Trump is facing criticism for his rhetoric against Democrats and the media over how his words could lead to violence against those he has attacked.
Earlier Thursday, a suspicious package addressed to actor-director Robert De Niro was reported at the Manhattan building where his production company is based, and its marking and contents appear similar to the other pipe bomb packages, two law enforcement sources said. A supporter of the Democratic Party, De Niro has openly criticized Trump, saying he's "so blatantly stupid" and, onstage at the Tony's, "fuck Trump".
The official wasn't authorized to discuss an ongoing investigation publicly and spoke to The Associated Press on Thursday on the condition of anonymity. MSNBC reported a second suspicious package also was discovered.
On Thursday, without directly referencing the explosive devices, Trump again blamed the media for the "anger" in society.
"It has gotten so bad and hateful that it is beyond description".
"We will bring them to justice", President Trump said Wednesday night during a rally in Wisconsin. As at the time the parcel got to the restaurant, nobody was in the premises.
"You can not be civil with a political party that wants to destroy what you stand for, what you care about", she said. Officials say the packaging was similar to the manila envelopes containing bombs sent to CNN, George Soros, and prominent members of the Democratic leadership.
The first crude bomb discovered was delivered on Monday to the suburban NY compound of George Soros, a liberal billionaire and major contributor to Democratic causes. The return address on all of them was, as you mentioned, for Wasserman Schultz, although her last name was misspelled.
On Wednesday, officials said that similar devices were sent to people, including Obama, Clinton and Representative Maxine Waters of California - all Democrats.
Trump has previously condoned the behavior of Rep. Greg Gianforte, a Montana Republican who body slammed a reporter a year ago, neo-Nazis who rioted in Charlottesville, Virginia, resulting in a woman's death, and Trump supporters who have attacked protesters at his rallies.
The FBI is conducting an investigation into the matter, and has noted all packages have the same return address of Florida congresswoman Debbie Wasserman Schultz.
Each bore a computer-printed address label and six "Forever" postage stamps.
The suspicious devices are on their way to the FBI's crime lab in Quantico, Virginia. Officials provided no details on a possible suspect or motive.
"I have been informed by U.S. Capitol Police that my Washington, DC office was the target of a suspicious package that has been referred to the FBI", Waters said in a statement on October 24.
Other packages have been addressed to a former US attorney general, two Democratic Party members of Congress and former Central Intelligence Director John Brennan.
Senate Democratic Leader Chuck Schumer and House of Representatives top Democrat Nancy Pelosi said Trump's call for unity rang "hollow" because of his past statements condoning acts of violence.
The powder was tested and determined to have been harmless, according to a law enforcement official.
NY police have removed a suspicious package from a building associated with actor-director Robert De Niro, a vocal critic of US President Donald Trump.
U.S. authorities are searching for suspects in the sending of package bombs to high-profile Democrats in what's been called a terrorist act that's raised tensions in a nation already polarised ahead of elections in November.
Suspicious packages appearing to be bombs targeted former first lady and U.S. Sen.