Special Counsel Robert Mueller has confirmed he will testify in open session before two US congressional committees on 17 July. It comes after he was issued with subpoenas by the House of Representatives Judiciary and Intelligence committees. Both committees have been negotiating with Mr Mueller for two months about his testimony, but the special counsel has been hesitant to testify. Last month, Mr Mueller made a statement about his investigation into Russian interference in the 2016 US presidential campaign, saying he could not clear President Trump of criminal wrongdoing, but found no conclusive evidence he obstructed justice.