During my visit to London, Prime Minister Cameron and I will take on the full array of these challenges. We must be resolute and adaptive in our efforts to prevent terrorist attacks against our people, and to continue the progress we are making to roll back the threat posed by Islamic State (Isil) until it is destroyed. We must work to resolve political conflicts in the Middle East – from Yemen to Syria to Libya – so that there is a prospect for increased stability. We must continue to invest in Nato – so that we can meet our overseas commitments from Afghanistan to the Aegean, and reassure allies who are rightly concerned about Russian aggression. And we must continue to promote global growth, so that our young people can achieve greater opportunity and prosperity.

I realise that there’s been considerable speculation – and some controversy – about the timing of my visit. And I confess: I do want to wish Her Majesty a happy birthday in person.

But also I understand that there’s a spirited campaign under way here. My country is going through much the same. And ultimately, the question of whether or not the UK remains a part of the EU is a matter for British voters to decide for yourselves.

That said, when President Roosevelt toasted to our special relationship that night, he also remarked that we are friends who have no fear of each other. So I will say, with the candour of a friend, that the outcome of your decision is a matter of deep interest to the United States. The tens of thousands of Americans who rest in Europe’s cemeteries are a silent testament to just how intertwined our prosperity and security truly are. And the path you choose now will echo in the prospects of today’s generation of Americans as well. 

As citizens of the United Kingdom take stock of their relationship with the EU, you should be proud that the EU has helped spread British values and practices – democracy, the rule of law, open markets – across the continent and to its periphery. The European Union doesn’t moderate British influence – it magnifies it. A strong Europe is not a threat to Britain’s global leadership; it enhances Britain’s global leadership. The United States sees how your powerful voice in Europe ensures that Europe takes a strong stance in the world, and keeps the EU open, outward looking, and closely linked to its allies on the other side of the Atlantic. So the US and the world need your outsized influence to continue – including within Europe.

In this complicated, connected world, the challenges facing the EU – migration, economic inequality, the threats of terrorism and climate change – are the same challenges facing the United States and other nations. And in today’s world, even as we all cherish our sovereignty, the nations who wield their influence most effectively are the nations that do it through the collective action that today’s challenges demand. 

When we negotiated the historic deal to verifiably prevent Iran from developing a nuclear weapon, it was collective action, working together with the permanent members of the UN Security Council and Germany, that got the job done. And the EU’s seat at the table magnified the United Kingdom’s voice.

When the climate agreement in Paris needed a push, it was the European Union, fortified by the United Kingdom, that ultimately helped make that agreement possible.

When it comes to creating jobs, trade, and economic growth in line with our values, the UK has benefited from its membership in the EU – inside a single market that provides enormous opportunities for the British people. And the Transatlantic Trade and Investment Partnership with the EU will advance our values and our interests, and establish the high-standard, pro-worker rules for trade and commerce in the 21st century economy.

This kind of cooperation – from intelligence sharing and counterterrorism to forging agreements to create jobs and economic growth – will be far more effective if it extends across Europe. Now is a time for friends and allies to stick together.

Together, the United States, the United Kingdom, and the European Union have turned centuries of war in Europe into decades of peace, and worked as one to make this world a safer, better place. What a remarkable legacy that is. And what a remarkable legacy we will leave when, together, we meet the challenges of this young century as well.

Full article on The Telegraph