President Trump condemned a series of mail bombs while speaking at the 2018 Young Black Leadership Summit at White House on Oct. 26, 2018 in Washington, DC.

President Trump issued a firm denunciation of political violence in announcing the arrest of the mail bomb suspect Friday, but repeatedly undercut his attempts to come across as a unifying leader at a time of crisis.

"These terrorizing acts are despicable and have no place in our country," Trump said, while also praising law enforcement officials for the swift arrest, since the first packages started arriving on Tuesday.

"We must never allow political violence to take root in America," he said. "I'm committed to doing everything in my power as President to stop it."

The bombs were mailed to targets including former President Barack Obama, to the home of former Secretary of State Hillary Clinton and President Bill Clinton, billionaire liberal donor George Soros, and the CNN bureau in New York.

Trump's remarks, read from a teleprompter were in keeping with a grave moment, and would stand comparison to any comments by a previous President at a time when Americans were worried about their security.

But Trump has no intention of calling those targeted with pipe bombs, a senior White House official told CNN.

And he declined to mention any of the targets or their party affiliation by name, only citing them as public figures, adding to indications that the President rejects any suggestion that his own rhetoric could be partly to blame for fostering a febrile political atmosphere in which the packages were sent. He also noted a media organization had received a bomb, but did not specify that it was CNN.

"But the bottom line is that Americans must unify, and we must show the world that we are united together in peace and love and harmony as fellow American citizens," Trump said at the White House. "There is no country like our country, and every day we are showing the world just how truly great we are."

His unifying and elevated tone contrasted sharply with his attitude towards the case when he was not reading a script.

Earlier, in a tweet, the President appeared to give credence to conservative media narratives that the media's focus on the bomb mailings was deliberately designed to hurt GOP prospects at the polls in 11 days time.

"Republicans are doing so well in early voting, and at the polls, and now this "Bomb" stuff happens and the momentum greatly slows - news not talking politics. Very unfortunate, what is going on. Republicans, go out and vote!" Trump tweeted.