A federal judge Monday rejected Oliver North's bid to make Ronald Reagan the lead defense witness at his Iran-Contra trial but left open the prospect that the former president would be summoned later. U.S. District Judge Gerhard Gesell said there was "insufficient time" to decide by Friday whether Reagan's testimony would be so important to the case against the former White House aide to require his presence on the witness stand. The defense had wanted Reagan as its lead witness on Friday. Gesell directed North's lawyers to submit, by Wednesday afternoon, a confidential memorandum stating what testimony they want from Reagan.