Sir, - It is now clear that political pressure from US president Donald Trump, with the compliance of Fifa, has led to the reversal of a straightforward and automatic suspension of an American player from the World Cup game against Belgium.Not content with undermining the rules-based order in international relations, Trump has now turned his destructive and insidious attention to sport.The integrity of a superb tournament has been sullied, and it is now time for all international and national sporting bodies to cry halt. – Yours, etc,MARTIN Mc DONALD, Terenure, Dublin 12.Sir, - If anything, US Soccer should show Donald Trump the red card. – Yours, etc,DAVID WALSH, Athboy,Co Meath.