By Jeffrey Heller
JERUSALEM, Sept 23 (Reuters) - After failing to secure a clear election victory twice in six months, Israel's longest-serving prime minister now seems to be calculating that he can stay in power only by sharing it.
Following a deadlocked parliamentary election last week, a weakened Netanyahu reissued an offer on Monday to his centrist rival Benny Gantz for a unity government, saying that neither had enough support from respective allies for a majority of 61 seats in the 120-member parliament.
There was no sign Gantz, head of the Blue and White Party, would agree to a coalition with Netanyahu's right-wing Likud. Gantz cited looming corruption charges against Netanyahu in saying no last week.
Israeli President Reuven Rivlin, who will pick a candidate to try to build a coalition, has called for a unity government - but does not have the legal power to compel Gantz or Netanyahu to form one together.
Wrapping up two days of consultations with leaders of all parties that won parliamentary seats in the Sept 17 ballot, Rivlin summoned Netanyahu and Gantz to a closed-door meeting later on Monday, apparently to urge them to join forces.
WHO HAS THE EDGE?
On paper, Netanyahu now has a slim lead over Gantz in building a parliamentary bloc, with pledges of support from 55 members of a right-wing grouping to 54 for Gantz from left-wing and Arab parties. But it also means that neither has secured a governing majority of at least 61 legislators.
Netanyahu's slight edge might move Rivlin to ask him to try to build a narrow coalition if a unity government proves impossible. A nominee gets 28 days to do so, with a possible 14-day extension, before Rivlin can turn to someone else.
Gantz had appeared to have 57 backers but three of the Arab Joint List's 13 members on Monday withdrew support they had pledged to him a day earlier.
Likud won 31 seats to Blue and White's 33, near-complete results show.
Avigdor Lieberman, whose far-right Yisrael Beitenu party won eight seats, would remain the kingmaker if unity efforts fail. In his meeting with Rivlin, he refused to commit to either Netanyahu or Gantz, citing his own policy differences with Likud's Jewish ultra-Orthodox allies and Blue and White's Arab backers.
WHAT ARE THE CHANCES FOR A UNITY GOVERNMENT?
It's complicated, even though there are only narrow policy differences between Netanyahu and Gantz on many important issues, such as relations with the United States, the regional struggle against Iran and the Palestinian conflict.
Both men appear to be more deeply divided on the composition of a unity government.