A federal judge on Thursday ordered President Trump to sit for a deposition by Dec. 11 in his $10 billion defamation lawsuit against the BBC over an edit of one of his speeches that the president's lawyers say was misleading.Why it matters: The order will likely force Trump to answer questions under oath in a legal battle he started.Driving the news: Judge Enjoliqué Lett ordered Trump to appear by Dec. 11, after lawyers for the BBC argued that Trump is improperly delaying his appearance.