The president's pledge to restore jobs to American workers is running into conflict with other economic goals.

Speaking on CNN's 'State of the Union,' White House border czar Tom Homan said the administration would intensify the focus on workplaces.

South Korea has said that 300 of its nationals detained during the immigration raid would be flown home. Key US politics stories from Sunday 7 September at a glance

US president says foreign firms need to respect US immigration laws, as South Korea works bring detained workers home.

President Donald Trump on Sunday sent a warning to countries that have manufacturing plants in the United States to "please respect our Nation's Immigration Laws."

The president's pledge to restore jobs to American workers is running into conflict with other economic goals.

The immigration raid on a Hyundai plant last week could leave other companies scrambling to make changes.

The South Korean companies' metaplant in Georgia was the target of a vast federal immigration raid on September 4, during which 475 people were detained.