Mitt Romney election rally
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US election: Obama and Romney target key swing states

Barack Obama and Mitt Romney are spending the weekend in a frenetic round of campaigning ahead of Tuesday's US presidential vote.

With the candidates running virtually neck-and-neck in the polls, they have been focusing on the crucial undecided swing states.

Mr Obama said he wanted to create a future "built on a strong and growing middle class". Mitt Romney talked of wanting to lead the US to a "to a better place''.

Bridget Kendall reports from Washington.