US Democratic presidential candidate Barack Obama is winding up the last leg of his "world tour" to the Middle East and Europe designed to boost his say in foreign affairs amid a presidential campaign dead heat back in the United States.

On Saturday, Obama told a news conference that "the reason that I thought this trip was important is that I am convinced that many issues that we face at home are not going to be solved as effectively unless we have strong partners abroad."

Britain's Prime Minister Gordon Brown (L) shows US Democratic presidential candidate Senator Barack Obama the terrace at 10 Downing Street in London, July 26, 2008.

When meeting with British Prime Minister Gorden Brown Saturday, he said "We share the same language and the same belief" and Britain and the United States have gone through the world wars together and share same views on the world order."

In a move to respond to criticism that he is "naive and innocent" in foreign policy, Obama also discussed climate change, international terrorism and the Middle East situation with Brown and reiterated his call for increasing the number of US troops in Afghanistan.

During his visit to France, Obama held discussions with French President Nicolas Sarkozy.

US Democratic presidential candidate Senator Barack Obama(L) holds a joint news conference with France's President Nicolas Sarkozy at Elysee Palace in Paris July 25, 2008.

Speaking at a joint press conference, Sarkozy said there was a "great convergence of views" with Obama and that they had much to do in dealing with issues such as climate change, reform of world institutions and the maintenance of world peace.