I'm Neil Patterson, welcome to the Sky News Daily as America, indeed the world is still coming to terms with the assassination attempt on Donald Trump.

The photograph of the former president surrounded by Secret Service, bloodied but unbowed, fist raised in defiance, may yet prove to be the image of this election, despite it being 113 days away.

Yet this is a country that knows political violence all too well.

Four of its presidents were assassinated.

Abraham Lincoln, 1865.

James Garfield, 1881.

William McKinley, 1901, John F. Kennedy, 1963.

Others, like Trump, have survived the attempt, most recently Ronald Reagan in 1981,

and other political figures like Martin Luther King have also paid the ultimate price.

Little wonder that both Donald Trump and Joe Biden

have called for Cam, called for unity. Here's the 46th president of the United States,

speaking in the aftermath of the attack on the 45th. There's no place in America of this kind of

violence for any violence ever. Period. No exceptions. We can't allow this

violence to be normalized. You know, the political record in this country has gotten very heated.

It's time to cool it down. But can this country heal what are clearly some very deep divisions?

Later, we'll look in depth at the history of political violence in the United States with one US historian.

But politics there continues, of course.

Republicans are gathering in Milwaukee for the party's national convention.

President Trump is due there later, but there already are US correspondent James Matthews.

James, good to see you. Look, we have just been hearing Joe Biden speaking from the Oval Office,

from the Resolute Desk, looking fairly presidential, you have to say, on an occasion such as this.

But I suppose it's the rhetoric that's important.

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