Mitt Romney is fighting his way back into the driver’s seat in the Republican presidential race, putting in a strong debate performance in Arizona and gaining in polls against conservative rival Rick Santorum.

Republican Mitt Romney is sensing an opening to win next Tuesday’s Iowa caucuses, and he is campaigning with increasing confidence – and a new crush of advertising – to bolster his closing argument: that he is the most electable candidate to challenge US President Barack Obama in November.

Presidential hopeful Barack Obama has pulled ahead in key swing states, a new poll revealed today.