Mr Trump said the two European nations had been “totally compromised by terrorism” because they had “allowed people in”.
He suggested that terror attacks in France and Germany were their “own fault” and citizens of the countries could now be subject to “extreme vetting” entering the United States.
He said: “We’ll renegotiate or pull out. These trade deals are a disaster. The World Trade Organisation is a disaster.”
When asked if his “extreme vetting” policy might lead to “a lot of people from overseas” not being allowed in the Republican presidential nominee said: “Maybe we get to that point.”
‘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.
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.’
The billionaire originally sparked worldwide outrage in December when he proposed a “total and complete shutdown of Muslims entering the United States” in the wake of a terror attack in San Bernardino, California.
His suggestion was condemned as contrary to the US Constitution because it targeted an entire religion.
Mr Trump said: “People were so upset when I used the word Muslim. I’m OK with that, I’m talking territory instead of Muslim.
“I would stop the Syrian migration, and a Syrian from coming into this country, in two seconds.”
In the same interview Mr Trump reavowed his support for Brexit.
He said: “I’m the only one at higher levels of politics who said Brexit’s going to happen. Stock markets are higher than when it happened.
“Why primarily did the EU get together? So they could beat the US when it comes to making money. It was a consortium to beat the US. We’re in competition.”