"Let's get along", he said.
"I just want to tell you that in these times we have to unify. Have you ever seen this?"
President Donald Trump will campaign in eight states in the final days before November 6 USA congressional elections, putting most of his attention on tight races in which Republicans have a shot at winning Senate seats, White House officials said on Friday.
"The packages were immediately identified during routine mail screening procedures as potential explosive devices and were appropriately handled as such".
Asked whether the president meant to tone down his rhetoric and personal attacks, she said the president would "continue to lay out the case in the differences between Democrats and Republicans" ahead of the midterm elections next month. This is coming two days after a bomb was found at the home of liberal philanthropist and financier George Soros in the suburbs of New York City.
The president has also been critical of Holder, after the former attorney general made a controversial remark on Democratic campaign strategy: "When they go low, we kick them", Holder said of Republican candidates earlier this month. Debbie Wasserman Schultz, whose return address was on it. "The President, and especially the White House Press Secretary, should understand their words matter".
"In these times, we have to unify, we have to come together and send one very clear, strong, unmistakable message that acts or threats of political violence of any kind have no place in the United States of America". "We must never allow political violence to take root in America, can not let it happen".
Journalist Geraldo Rivera, who walked back his earlier theory that the bombing plot was a hoax to make Republicans look bad, said Mr. Sayoc "has long criminal history of extremist behavior - like his 2002 bomb threats - which predate @realDonaldTrump's political career".
Trump said that political violence isn't part of America and can not be allowed to become a part of the country. Those involved have all been targeted by Trump and the right.More news: East Coast Braces For Potential Powerful Storm This Weekend
It came as federal authorities said a package addressed to Waters with similar markings and characteristics to the other devices was intercepted at a Los Angeles mail facility. Officials provided no details on a possible suspect or motive.
"So far the devices have been what appeared to be pipe bombs", John Miller, the New York City police deputy commissioner for intelligence and counterterrorism, told a news conference.
The US Secret Service intercepted a bomb that was addressed to Hillary Clinton at the NY home she shares with former president Bill Clinton, and another that was sent to Mr Obama at his home in Washington.
Neither bomb got close to its intended target, and neither contained a written message, according to law enforcement officials, but the twin discoveries led to other undetonated devices being found elsewhere, including in the mailroom at CNN's NY headquarters and a district office of Rep. "Your inflammatory rhetoric, insults, lies, & encouragement of physical violence are disgraceful".
At least one bomb was packed with shards of glass, one federal source said.
The president spoke to the media and said that he was proud of the work of law enforcement officials for "finding a needle in a haystack". The report, released by Democratic staff on the House Oversight Committee, serves as a counterpoint to claims by Republican claims heading into the midterms that they will protect people with pre-existing conditions. He said that the government was conducting a full investigation into the sending of these packages.
The package sent to Biden was found at a postal facility in New Castle, Delaware, while the package sent to De Niro's Manhattan office was called in by a building worker who was anxious about a suspicious package that arrived days earlier.
The cable network said the package also may have included a white powder-like substance.