The struggle between supporters of the legal team's steady, cooperative approach, and the band of Trump loyalists who yearn for a fight, comes as the Mueller probe begins lapping at the door of the Oval Office. Mueller, who is investigating the firing of former FBI director James Comey and other key actions of the Trump administration, has signaled that his team intends to interview multiple current and former White House officials in the coming weeks and has requested large batches of documents from the executive branch.