Donald Trump's policy of 'extreme vetting' would involve throwing the father of the Orlando nightclub shooter out of the country, the candidate said at a town hall event that aired Wednesday.

Trump, who has proposed a temporary Muslim ban and who on Monday described how the government would question immigrants trying to enter the U.S. from 'volatile regions, got asked about his plan by Fox News host Sean Hannity during a televised town hall.

Hannity asked about Seddique Mateen, who attended a Hillary Clinton rally in Florida this month, smiling and appearing right behind the candidate in the camera shot of the event.

'You pointed out that this guy, the father of this Orlando shooter, and he was smiling, as you said – and Hillary, and you talked about her stupidity and her weaknesses – and he has explained his radical views. What do we do when we find somebody that has extreme views? Do we throw them the hell out?'

'I'd throw him out,' Trump responded.

'I'd throw him out,' Republican Donald Trump said when asked about the father of the Orlando nightclub shooter

GOOD SEAT: Seddique Mateen was spotted at a Florida speech by Hillary Clinton

Matteen was seen smiling at the event. Clinton addressed the Orlando shootings at the top of the event, but her campaign said she had no idea Matteen was there

'If you look at him – I'd throw him out,' Trump continued. 'You know, I looked at him, and you look, he's smiling, he had the red cap on. I thought it was one of my caps, I said "No, Make America great again," I don't think so.'

Trump was referencing his campaign own hats emblazoned with his campaign slogan.

Trump had gone after Clinton after news broke of the event in Kissimme, Florida, telling Hannity at the time, 'She did not disavow [him]. If that were me, this would be a headline all over.'

WPTV reported on his attendance.

Matteen's son Omar killed 49 people at Pulse nightclub on June 12. The Clinton camp said the elder Matteen wasn't invited to the speech and that the campaign wasn't aware of his attendance at the time.

Mateen hosts a satellite TV show that has an audience in Afghanistan as well as of Afghan immigrants to the U.S. According to a CBS report after the Orlando shooting, Mateen has backed the Afghan Taliban, expressed anti-American views, and said 'God will punish those involved in homosexuality.'

EXTREME VETTING: Trump said his screening policy would involve throwing longtime resident Matteen, who has expressed support for the Afghan Taliban, out of the country

Trump also got asked how he could possibly know whether people believe in Islamic Sharia law, after saying people who believe Sharia law takes precedence over the U.S. Constitution should be kept out.

Trump brought up the San Bernardino killings, which he called a 'horror show.'