Former President Bill Clinton has expressed remorse over his role in negotiating a 1994 deal that resulted in Ukraine giving up its nuclear arsenal, suggesting that Russia never would have invaded its smaller neighbor if it still had nukes. “I feel a personal stake because I got them [Ukraine] to agree to give up their nuclear weapons. And none of them believe that Russia would have pulled this stunt if Ukraine still had their weapons,” Clinton told Irish broadcaster RTE in an interview that aired Tuesday. The 42nd president was referencing a landmark post-Cold War deal in which then-Ukrainian President...