Donald Trump said that he’d be willing to talk under oath to Special Counsel Robert Mueller who is investigating whether anyone close to the president colluded with Russia during the 2016 campaign. “I’m looking forward to it,” Trump told reporters in a surprise appearance at a briefing Wednesday at the White House. As part of his investigation, Mueller is focusing on whether Trump obstructed justice when he removed his national security adviser, Michael Flynn, and fired FBI Director James Comey, according to two U.S. officials. The main topics of an interview would be those two decisions early in his presidency, according to a person with knowledge of the matter.