As a prosecutor, Robert Mueller took on violent Hells Angels, mob bosses and foreign spies. At the end of his career, he was tasked with hunting the biggest target of all: the president of the United States. For two years, Mueller dug for the truth behind the most explosive political investigation in American history: Did Donald Trump or his campaign …

President Trump’s campaign did not conspire with Russia during the 2016 election, according to a summary of Special Counsel Robert Mueller’s report submitted to Congress on Sunday. The report summary did not draw a conclusion as to whether Mr Trump illegally obstructed justice – not exonerating the president. The report was summarised for Congress by the attorney general, William Barr. …