The shift in tone and mood was unmistakable as US president Joe Biden visited the Republic of Ireland, having spent a short time in Northern Ireland. Baseball cap on, and into a pub. ‘It feels like I'm coming home,’ he said in Dundalk, County Louth. The NI politics tightrope negotiated, it seems it is now time to unwind a little. His sister and son were in tow: it was not diplomacy but a return to family roots and a sense of belonging. 30 million Americans also have Irish ancestry, and Biden hopes for a political dividend the year before a presidential election. Meanwhile his visit to Northern Ireland, although talked about for months, only lasted 17 hours. There is no such thing as a low-key trip for an American president, but this came close. Quick, short, with Rishi Sunak's input minimal, not even appearing at Biden's only public appearance - raising some eyebrows in government.