I think he should be allowed as he is President of the US, but admittedly not everyone's cup of tea.

I wonder what he'd tweet?

So Donald Trump's will not be invited to The Wedding,yet Obama is welcomed.People have short memories.Obame looked the U.K in the eye and threatened us all, that if the citizens of Great Britain DARED to vote LEAVE in the European Referendum we would be put to the BACK of the queue as far as trade with the U.S.A was concerned.Trump,after all,did say that the UK would be at the FRONT of the queue.This country is being highjacked by egotistical tv reporters and commentators who are taking a lead from MOMENTUM. Trump only has to glance Eastward and he is accused of collusion with the Soviets yet Corbyn can have tea and biscuits in our Houses of Parliament with a proven Eastern Block spy. Strange world

Obama was the best President America has had in a good while. Trump is an unpleasant clown who is a danger to this planet, he is mad, bad, or both. Harry's wedding day should be as happy affair for their family not messed up buy the inevitable demonstrations there will be if that crazy Trump puts in an appearance.

I agree. 👍 The Obamas would be asked as friends of the couple not as political guests.
Then again I suppose it could be influenced by Trumps radio interview with Howard Stern when they both laughed and agreed that Trump could easily of "nailed" Diana but would have made her have an HIV test first.

The man would be an embarrassment.