President Barack Obama and First Lady Michelle have not been invited to Prince William and Kate Middleton’s wedding. The Queen personally invited 40 heads of state, who received the gold-embossed invitations over the weekend to the April 29 wedding of the future king. The Obamas, however, were not among them. But they can take solace in the knowledge that they will be the guests of their very own state visit to the UK in May. There have been suggestions that the state visit – the first for a US President since 2003 – was set up in return for Obama...