Whose leadership, whose judgment, whose values do you want in the White House when that crisis lands like a thud on the Oval Office desk?

The person who takes the oath of office in the next four months will shape not just the next four years, but the next forty years of our nation. In these next four years, we need proven leadership, proven judgment and proven values. America needs four more years of President Barack Obama.

I have run a general election campaign pregnant and ran Ed Miliband's leadership campaign commuting to London with a new baby so I already have my system set up.

It's not a matter of if economies around the world becoming low-carbon, but when and how: through struggle and strife or through advancement and progressive leadership. Larry Elliot described it today as the 'Green New Deal.' It's a leadership we in Britain can provide, and from which our economy can benefit.

Each one of us, and, indeed, all those who aspire to national leadership must bring their own visions, views and styles to the business of reforming Nigeria, and the search for solutions.