Media mogul Rupert Murdoch on Saturday Tweeted that the reelection of US President Barack Obama would be a "nightmare for Israel," and accused Vice President Joe Biden of lying about his relationship with Prime Minister Binyamin Netanyahu.

"Nightmare for Israel if Obama wins. Biden outright lied about personal relations with Bibi. Susan Rice for State real nightmare," wrote Murdoch, who is the CEO of News Corporation, which owns major media outlets such as the Wall Street Journal and Fox News.

In Thursday's vice presidential debate, Biden said the he and Netanyahu had been friends for 39 years.

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