Donald Trump has said people from France and Germany could face 'extreme vetting' before entering the United States because their countries have been 'compromised by terrorism'.

In his nomination acceptance speech at the Republican National Convention, he said he wanted to crack down on immigration with countries where terror attacks were rife.

He expanded on his aggressive policy on NBC's Meet The Press where he blamed France and Germany for letting terror flourish, saying: 'It's their own fault... They allowed people to come into their territory.'

'Here's my plan - here is what I want: Extreme vetting. Tough word. Extreme vetting,' he told Chuck Todd.

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Donald Trump reasserted his controversial foreign policy plans in a new interview in which he said France and Germany were to blame for letting terrorism flourish in their countries

When asked if the controversial policy may keep 'a lot of people' from being allowed into the country he said: 'Maybe we get to that point.'

Not only did he blame Germany and France for allowing 'terrorists' to creep across their borders, he claimed Britain left the EU because of radicalization in mainland Europe.

He said: 'There are specific problems in Germany and we have problems with France... They have totally been [compromised by terrorism].

'And that's why Brexit happened, okay? Because the UK is saying, "We're tired of this stuff, what's going on, we're tired of".

'We're going to have tough standards. And if a person can't prove that they're from an area, and if a person can't prove what they have to be able to prove, they're not coming into this country.'

He said his bitter presidential rival Hillary wanted to bring in 550 per cent more Syrians than her predecessor Barack Obama and he would stop migration from the region in 'two seconds'.

'I think she's crazy,' said the real estate mogul who also reasserted his vow to build a border along the US-Mexico border if he is elected the country's 45th president.

'It's their own fault... They allowed people to come into their territory,' said the Republican presidential nominee (center)

A protester held up a sign saying 'build bridges not walls!' while trump spoke during the Republican National Convention

Trump went on to say that - under him - America would build a 'safe haven' for Syrian in the Middle East and the wealthy Gulf States would pay for it. It mirrored his assertion that Mexico would pay for the wall separating it from America.

He said: 'They're [Gulf States] not doing much. They have nothing but money. We will get them to pay for it.'