US President Barack Obama plunged into Britain's poisonous European Union membership debate Friday, arguing strongly against a "Brexit" as he kicked off a visit to the UK. Obama's intervention ahead of the June 23 vote in a piece for the Daily Telegraph newspaper drew a furious response from eurosceptics like London Mayor Boris Johnson, who said he should mind his own business. Writing in the Telegraph, a traditional bastion of euroscepticism, Obama argued that Britain's place in the EU magnifies its global influence and its membership is a matter of "deep interest" to the United States.
