Joe Biden's White House tried to put out the flames of a major transatlantic bust-up with Britain today after the president was accused of rebuking Boris Johnson for 'inflaming tensions' in Northern Ireland. Brexiteer Tories branded the 78-year-old Democrat 'senile' after he failed to side with the UK in its 'sausage war' bust-up with the EU. The US President instead used his diplomats to express 'great concern' over the conflict centred on post-Brexit trade rules agreed last year by both sides, which the UK is now seeking to change, the Times reported today. The US is said to have issued...