Hillary Clinton's first television ad of the general election is a square attack on Donald Trump as temperamentally unfit to lead the country, using the Republican's own words to cast him as insensitive and callous.

The ad that begins airing later this week sets up a comparison between Clinton's qualifications and what she suggests is Trump's default to bombast and ridicule.

It will follow a speech Clinton plans in Ohio on Monday that will attempt to frame the election as a stark choice about reason and values. That comparison, visible in Clinton's address earlier this month picking apart Trump's foreign policy views and credentials, is emerging as the crux of her general election strategy.

The ad, titled "Who We Are", is narrated by Clinton. It includes clips of Trump at campaign events talking about beating up people and mocking a reporter's disability.

"Today, we face a choice about who we are as a nation," Clinton begins.

The ad then cuts to Trump at a podium saying, “I’d like to punch him in the face.”

Clinton asks, "do we help each other? Do we respect each other?" as the ad cuts to Trump disparaging and belittling people.

"I know what I believe. It’s wrong to pit people against each other," Clinton says in then ad.  "What kind of America do we want to be? Dangerously divided, or strong and united? I believe we are always stronger together."

That theme of strength through unity is Clinton's latest campaign mantra,with Trump in mind.

Clinton's campaign said the ad will air in battleground states beginning on Thursday. The campaign did not initially release information about the size and cost of the television buy.

Trump responded Sunday morning on Twitter, calling Clinton's claims that he had mocked a disabled reporter "false." Trump said he would never do that. "Shame," he wrote.

Trump previously has denied mocking New York Times reporter Serge Kovaleski, who has arthrogryposis, a physical condition that visibly limits flexibility in his arms. Trump was roundly criticized when he first referred to Kovaleski during a campaign speech last fall.