One of the more bizarre rows in American politics has resurfaced as the country prepares for crucial mid-term elections this year. The so-called 'birthers' movement, which questions whether Barack Obama was born in the US and is therefore a legitimate president, has cropped up on the campaign. A representative in Arizona's state senate has even introduced a 'birth certificate bill' because she says constituents are so worried. The White House has consistently dismissed the issue. Authorities in Hawaii have provided an electronic record of Obama's birth because the paper copy was destroyed in a fire which wiped out much of...