John McCain, the irrepressible Senator from Arizona, stood on the brink of winning the Republican party’s nomination for United States president this week with almost half of the…

It’s an exacting task campaigning for president — you have to be an expert on everything, including gas-electric hybrid propulsion systems for a new generation of sedan cars.…

The United States on Thursday took a first step towards mandatory controls on greenhouse gas emissions, in direct defiance of the Bush administration’s policy on climate change.…