arguably the most important, the work of this man, robert muller. he is leading an investigation into those alleged ties between the trump campaign and russia. we have an update on that, in the last few minutes this copy has come into the newsroom , minutes this copy has come into the newsroom, telling us that mr trump's campaign manager paul manafort has sued robert muller, saying it exceeded his legal authority. tell us exceeded his legal authority. tell us more, that sounds significant. as you remember, paul manafort has been indicted for money laundering and corruption charges dating back to when he was before donald trump was my campaign manager to his lobbying activities on the part of ukrainian government officials. here he is now attempting to challenge that indictment, saying robert muller had overstepped his bounds. saying he should surely be focusing on this russia collusion investigation. it echoes a lot of what the white house is saying, that independent investigation is running wild. here we have a legal challenge authority. i don't th