In this excellent article, the Guardian reports that the German chancellor plans to make climate change, free trade and mass migration key themes in Hamburg, putting her on collision course with US.
Source: Angela Merkel and Donald Trump head for clash at G20 summit | World news | The Guardian
This article paints an alarming picture of US isolationism under President, Donald Trump. It suggests that the world is looking for a new global champion for liberal values.
This weekend Angela Merkel has encouraged European allies to speak with one voice to Trump in Hamburg next week. Of course, Trump will not be bullied – meanwhile Russia, China and non-European countries will be playing their own hands with new confidence because Trump has upset the established world order.
Despite huge promise and regular demonstrations, the G20 is well known for achieving little. But this time, rather than gains, we could see losses.
Thoughts?
Dr Alf's Blog 
I tend to agree with Dr Alf, the G20 is a forum which manages to generate more hot air than the Welsh Assembly and produces very little.
It is effectively a ritual in which world leaders get together in secret to deliberate what their ultimate masters have decided.
It reminds me of my former corporate life when the chief executive would preside over sector board meetings in which nothing was ever decided or allowed to be decided. He would then issue instructions on what he had decided all along.
Europe is not going to speak with “one voice”, unless it is Angela Merkel’s, and since America is now only really interested in the countries of the Pacific Rim and denying China access to Africa’s mineral resources, Donald Trump will at best pay lip service to what she says.
In the background, the march to war continues with Iran and what lies in its surrounding deserts firmly in the cross hairs. General Mattis and his co warriors have this to think about and of course the problems represented by China, Russia and North Korea.
Against these bigger geopolitical issues and the fact that Trump may not last that long in office, the West is effectively split and rudderless.