The FBI made the request because such wiretapping would be illegal, since the President cannot just order the eavesdropping of a U.S. citizen's phones, the sources said. The sources would not say who was involved in the conversations between the FBI and DOJ.
So far, the Justice Department has not said anything in reaction to Trump's tweets on Saturday, in which he made the wiretapping allegations.
Asked about the FBI request, a Justice Department spokesman said he had no comment. The FBI refused comment as well.