In between endorsing various Tory leadership candidates and denying calling Meghan Markle "nasty", Donald Trump's recent state visit and European tour was only very marginally outshone by the occasion of the 75th anniversary of D-Day.

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Of course, Trump was unlikely to let arguably the single most momentous and traumatic day of fighting of the 20th century upstage him. He was one of 15 world leaders to sign a special D-Day proclamation reaffirming the importance of co-operation and peace, but took the opportunity to remind everyone in Europe who's the best by completely forgoing basic letter-signing decorum.

Nothing says "We affirm that it is our shared responsibility to ensure that the unimaginable horror of these years is never repeated" quite like scrawling your name at the top of a proclamation to show you're actually the best. You'd think that after two and a bit years in office Trump would have a handle on the basics of signing international agreements, but that he doesn't says as much about his attitude to international co-operation as anything else.

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Some theories, then. Did he think that every world leader got their own printout to take home from this enormously costly primary school history lesson, and worried that Emmanuel Macron would wander off with his copy of this worksheet?

Or is it just that he never had Clippy the Microsoft Office paper clip guide him through how to format a letter, or at least to tell him, "It looks like you're on a fantastically petty ego trip. Would you like some help with that?"

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