We cannot allow this kind of violence to be normalized.

He added, The political rhetoric in this country has gotten very heated.

It is time to cool it down.

Joe Biden speaking from the Oval Office earlier this month.

Joe Biden speaking from the Oval Office earlier this monthGetty Images

We all have a responsibility to do that.

Holocaust Museum’s Board

Yes, we have deeply felt strong disagreements.

The stakes in this election are enormously high.

Donald Trump and ABC News' Terry Moran

I believe that with all my soul.

I know that millions of my fellow Americans believe it as well.

Disagreement is inevitable in American democracy.

Its part of human nature.

But politics must never be a … battlefield, or God forbid, a killing field.

The Republican convention will start tomorrow.

I have no doubt they will criticize my record and offer their own vision for this country.

We cannot, we must not, go down this road.

President Biden: “A former president was shot.

An American citizen killed while simply exercising his freedom to support the candidate of his choosing.

We cannot, we must not go down this road in America.

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More to come.