Likud’s chief asset, Prime Minister Binyamin Netanyahu, may also be its chief liability. His silence and ambiguity, his failure to preempt a nuclear-armed Iran and his alignment with Barak Obama on Middle East affairs affecting Israel’s vital security are hurting his party - the joint Likud-Yisrael Beitenu ticket – which, 17 days before a general election, is on a downward slide to 34 from its first 47-seat rating. Yet, the polls still put him in the top slot (43+ percent) as favorite for prime minister and his left-of-center opposition is falling back.