The investigation into Donald Trump’s election campaign has resulted in guilty pleas from some of the president’s former inner circle. The Guardian’s Jon Swaine in New York considers what we have learned so far from Robert Mueller’s forensic investigation into Russian meddling in the 2016 US election. Plus: Robert Booth on the first phase of the inquiry into the Grenfell Tower fire. To support The Guardian’s independent journalism, visit theguardian.com/todayinfocus/support