Opinion polls put former armed forces chief Benny Gantz's centrist Blue and White party neck-and-neck with PM Benjamin Netanyahu's right-wing Likud, and suggest the far-right Yisrael Beiteinu party could emerge as kingmaker in coalition talks.
The announcement approving the settlement comes despite an international outcry over Israeli Prime Minister Netanyahu's promise to annex the West Bank's Jordan Valley.
The Israeli right led by Benjamin Netanyahu is having to grab increasingly more land from neighbours in order to shore up support at home.
Israel's Prime Minister Benjamin Netanyahu pledged to extend the country's sovereignty over the Jordan Valley and the northern Dead Sea.
Palestinians call the planned move a war crime under international law governing the occupied West Bank. Arab League and Jordon say the move would "push the region towards violence."
Less than one in four Palestinians have the right to vote in Israeli elections, but the election will inevitably affect every single Palestinian.
Some of the Bedouins have been living in the Jordan Valley before Israel was established in 1948.
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