Sarah Palin, one of the best known and most controversial figures in American politics, told BBC Newsnight she was weighing up whether the US was ready for an "unconventional" presidential candidate like her. "You run the race to win the race. That's for sure." Speaking in Alaska, the state's former governor said if she did decide to run she would be fully committed. But the cost together with whether voters were ready to make a win a reality, were issues she still needed to think about. "Obama has already said he's going to spend a billion dollars (£615.4m) on...