Customer holding copy of Sarah Palin's book in front of Ms Palin
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Sarah Palin book boosts presidential campaign rumours

Sarah Palin is adding fuel to rumours about a possible presidential campaign in 2012 with the publication of her book, America By Heart.

But former First Lady - and mother of George W Bush - Barbara Bush has already said the best thing Sarah Palin could do would be to stay in Alaska.

Mark Mardell reports from Washington.