Trump: Immigration is 'changing the culture' of Europe

"I think it has been very bad, for Europe. ... I think what has happened is very tough. It's a very tough situation -- you see the same terror attacks that I do," Trump said at a news conference with British Prime Minister Theresa May outside of London.

"I just think it is changing the culture, I think it is a very negative thing for Europe," Trump said.

"I know it is politically not necessarily correct to say that, but I will say it and I will say it loud," Trump added.

The President warned that immigration was hurting Germany and other parts of Europe "very much," apparently referring to a wave of refugees who have entered Europe from shattered Syria and other unstable societies in the Middle East and North Africa.

"I think they better watch themselves because you are changing culture, you are changing a lot of things, you are changing security."