Eric Trump thinks his sister Ivanka played a big role in their father's decision to launch a missile strike on a Syrian air base in response to the government's use of chemical weapons on its citizens.

"Ivanka is a mother of three kids and she has influence. I'm sure she said 'listen, this is horrible stuff.' My father will act in times like that," President Trump's 33-year-old son told The Daily Telegraph.

Eric Trump noted that in the past his father had been against military action in Syria, but the images of dying and wounded children "deeply affected" him.

"At some point America is the global leader and the world's superpower has to come forward and act and they did with a lot of support of our allies and I think that's a great thing," he said.

Ivanka Trump took an official role in the White House last month.

On Wednesday, a day before the U.S. launched 59 Tomahawk cruise missiles at a Syrian air base, she had tweeted about how "heartbroken and outraged" she was by the images of the chemical attack.

"Heartbroken and outraged by the images coming out of Syria following the atrocious chemical attack yesterday," she tweeted.