Lack of clear winners echoes uncertainty over who will claim party nomination.

Donald Trump does not herald some frightening new dawn of neo-fascism set to dominate US politics, writes Phil Quin. His extreme anti-Muslim and anti-immigration platform is not noticeably gaining ground.

At present, the atmosphere resembles a wild, uncontrolled rubbish dump. Polluters are free to sink their carbons into the atmosphere simply because they can, writes Klaus Bosselmann.

Many people will agree with the old saying that "all's fair in love and war". Others would add "and politics" - a view that certainly seems to be taken by some politicians.

Republican frontrunner claims more British Muslims join Isis than the UK's Armed Forces.

A global climate change deal has been hailed in New Zealand as a historic step, but scientists and environmentalists say the deal now needs to be backed with action.

The word "historic", already being used to describe the just-accepted Paris climate agreement, is more than warranted.

Donald Trump has stepped up his war of words with British officials over what he calls the UK's "massive Muslim problem".

The world finally has a new accord on climate action, with the French presidency finally releasing the text in Paris.