Britain’s welfare system is a "pull factor" for economic migrants looking to "play the system", a top aide to Donald Trump has told GB News.

Sebastian Gorka, who returned to the White House as Mr Trump's deputy assistant earlier this year, declared nations "must exercise sovereignty over their territory".

Mr Gorka made the claim following the US President's keynote speech at the United Nations in New York.

In his hour-long speech, Mr Trump took aim at London Mayor Sir Sadiq Khan and claimed Britain is "so changed" because "they want to go to Sharia Law".

Sebastian Gorka has warned that Britain's benefits system is a 'pull factor' for migrants to 'play the system'

He stated: "You're in a different country, you can't do that."

Delivering his verdict on President Trump’s speech to the UN, Mr Gorka told GB News: "I don't get all professorial about it, but the whole speech, which was just a tour de force, is really about the revitalisation, the rebirth, of the Westphalian model of nation states. The President believes that nations must have borders.

"Nations must exercise sovereignty over their territory. And what he means is, you're not a country, you don't have an identity if you don't control your borders and who comes into your countries.

"It's just a revenge of common sense, because everyone who lives in the real world knows that everything he said today is true, especially that."

He urged the Labour Government to learn from the President: "When the President talks about the lives that we have saved by closing the border, the women, the young girls who now will not be trafficked into sex slavery, those young girls who won't be raped by the coyotes who are smuggling them across the southern border.

Donald Trump took aim at Sadiq Khan, Europe, climate change and many others at the UN | POOL

"If you believe in humanity, if you want to save those children, those young women, every nation of the world should stand up and secure their borders, because by doing so, you make the human trafficking of the cartels impossible. If you want to save innocent women, innocent girls, then just secure your borders, whichever Government you are."

Mr Gorka also accused Labour of ignoring voters by failing to tackle illegal migration robustly: "That doesn't make any sense to the 17.4 million Brits who voted for national sovereignty in the greatest show of volition by the electorate of the United Kingdom, when they voted Brexit to leave the EU that's cut from the same cloth.

"It's about national sovereignty, it's about borders. If you believe in doing what is right for humanity, then you really should follow the model of the President. Just think about what he mentioned in his speech today."

Mr Trump's deputy assistant added: "Almost two million illegals have been removed from this country or self-deported because they're petrified of our border czar Tom Homan or the Homeland security advisor Stephen Miller, or the Secretary of Homeland Security, Governor Noem. That's how you save a nation.

Mr Gorka told GB News that being a refugee is 'not getting a free mobile phone and that cushy little hotel in Brighton'

Recalling his own life growing up in the UK, Mr Gorka told GB News: "I grew up in the UK, I was the child of refugees, but real refugees, people who would have been killed if they went back to their nation of birth, not economic refugees. And one last thing, and I don't want to get wonky here or like nerdy, but you can't claim asylum in a country that is far away from the country you left. International law is clear.

"Once you escape the nation of your birth that is persecuting you, whether it's a communist dictatorship, a fascist regime run by the cartels, you are required by international law to apply for asylum in the first safe country you arrive in."

He concluded: "You can't travel the globe from Africa through Afghanistan, through Western Europe, through Turkey, into France, across the channel, into the UK, and then request asylum, because then we know it's not about politics. It's not about persecution. It's about the welfare state.

"As you said, getting that free mobile phone and that cushy little hotel in Brighton, that's not being a refugee, that's being an illegal immigrant who's playing the system. Here in the US, we've stopped it. Every other country that believes in national sovereignty should stop it too."