US President Donald Trump remains determined to bring jobs at US firms in countries like Ireland back to the United States.

Trump Campaign Communications Director Tim Murtaugh told RTÉ's 'States of Mind' podcast that Mr Trump is concerned about jobs that have been lost to other countries in manufacturing, technology and pharmaceuticals and he wants those jobs back.

"I'm not going to tell your Irish pharmaceutical workers that they should be nervously eyeing their inbox for an email alerting them that they've been sacked or anything like that, but the president is determined to bring back jobs that have been lost to other countries over bad American policies under prior presidents," Mr Murtaugh said.

In May, Mr Trump vowed to bring US pharmaceutical manufacturing back to the United States, making specific reference to Ireland.

When asked about the US's dependency on drug manufacturing in China, Mr Trump said: "It's not only China, you take a look at Ireland.They make our drugs. Everybody makes our drugs except us.

"We're bringing that whole supply chain back," he said.

In March, Mr Trump was asked about access to medical devices and said: "Ireland does a lot of work for us in that world, in the pharma world. A very tremendous producer.

"We are looking to bring a lot more back home," he added.

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As part of his 'America First' policy, Mr Trump has repeatedly expressed his desire to see US companies move their foreign operations back to the United States from countries such as Ireland.

The Irish Government and IDA Ireland have insisted that the presence of US pharmaceutical companies in Ireland is of huge benefit to those firms as they can access EU markets, and that Ireland is an attractive location because of its combination of track record, skills availability and pro-enterprise policies