Embattled Israeli Prime Minister Benjamin Netanyahu declared a "huge" victory Friday, after winning a leadership primary that ensures he will lead his right-wing Likud party into a March general election.
Israel's longest-serving premier, who faces a corruption indictment and a third general election in 12 months, was expected to beat rival Gideon Saar but the convincing margin of victory strengthened his position in the party he has dominated for 20 years.
With all votes counted, the Likud announced that Mr Netanyahu had secured 72.5 per cent, with Mr Saar winning 27.5 percent.
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Mr Netanyahu, 70, called it a "huge win" and pledged to emerge victorious in the general election.
"Now is the time to unite and bring a tremendous victory for the Likud and the right in the election," Mr Netanyahu told a press conference.
"Most of the people support the right and support me to lead the government."
Most media commentators had predicted a Netanyahu victory but its scale made banner headlines.
"Netanyahu, big time," said Yediot Aharonot, Israel's top-selling daily.
State radio described it as a "landslide" victory for Mr Netanyahu.
The left-wing Haaretz newspaper described it as a battle between the "rational expediency" of Saar supporters and the "tribal loyalty" of the Netanyahu camp.
It noted the historic reluctance of Likud members to depose a sitting leader.
"Since 1948, the Labor Party has replaced its leader 17 times," it said. "The Likud has had only four leaders since Israel's inception, and only two since 1995.
"Netanyahu has led the party for the past 14 years consecutively, and for two decades altogether. Younger Likudniks have never known their party without Netanyahu at its helm."
Mr Netanyahu is scheduled to give a victory address at 11:00 am (0900 GMT).
Around 57,000 Likud members voted on Thursday - a little less than 50 per cent of those eligible.
Member of Israel's Likud party Gideon Saar arrives to cast his ballot during a primary election vote. Source: AAP
Mr Saar, a former minister seen as to the right of Mr Netanyahu, campaigned on the basis that the leader was no longer able to win elections after deadlocked polls in April and September.
"I am content with my decision to have stood. Those who are unwilling to take a risk for what they believe in will never succeed," Mr Saar tweeted.
"My colleagues and I will stand behind [Mr Netanyahu] in campaigning for the Likud's success," he added.
Mr Saar announced his leadership challenge last month after Israel's attorney general indicted the prime minister for fraud, bribery and breach of trust.
Mr Netanyahu denies the allegations, accusing the police, prosecutors and the media of a witch hunt.
Stephan Miller, a pollster who has worked on multiple Israeli campaigns, said Mr Netanyahu had campaigned harder than ever before to defeat Mr Saar.
Mr Netanyahu held several campaign events a day in different parts of the country, while on Thursday his Facebook page broadcast live video of him phoning supporters.
In the campaign's most dramatic moment on Wednesday, Mr Netanyahu was rushed off stage at a rally in the southern port of Ashkelon after a rocket was fired from the nearby Palestinian enclave of Gaza.
"His job was on the line and he fought to keep it successfully," Mr Miller said.
Immunity focus
Mr Netanyahu's downfall has been predicted repeatedly since he was elected for a second term in 2009, but he has defied expectations and beaten off multiple potential rivals.
He will likely remain prime minister at least until a new election on 2 March.
The Likud and the centrist Blue and White were near neck-and-neck after polls in March and September, with neither able to form a majority coalition under the country's system of proportional representation.
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Early polls indicate that the March 2020 election could again be a stalemate.
In the short term, attention will now turn to Mr Netanyahu's legal woes.
Mr Netanyahu is accused of corruption in three separate cases, ranging from receiving illegal gifts worth thousands of dollars to offering to change regulations in exchange for positive media coverage.
On Tuesday, the supreme court is expected to hold a hearing on whether a prime minister who has been indicted can form a government.
Under current understanding of the law, a prime minister is only forced to step down once convicted and with all avenues of appeal exhausted.
Mr Netanyahu also has until 1 January to decide if he will ask parliament for immunity.
Gayil Talshir, a professor of politics at the Hebrew University in Jerusalem, said the result could embolden Mr Netanyahu in his campaign against the charges.
"He is going to argue that the people chose him and not the mechanisms and the judiciary," Ms Talshir said.
"The big game for Netanyahu is immunity and for that he needs 61 votes [in the 120-seat parliament]," she said.
