August 25, 2015 8:46 AM EDT

Media mogul Rupert Murdoch announced his top choice for a presidential candidate on Sunday, urging New York City mayor Michael Bloomberg to “step into [the] ring.”

Murdoch touted Bloomberg as a serious contender to Republican frontrunner Donald Trump, who has held a narrow lead in the polls, despite stiff competition and a string of controversial comments. Murdoch dubbed Bloomberg as the alternative “billionaire candidate.”

Murdoch was tweeting from a yacht above the Great Barrier Reef, off the coast of Australia, where he also seemed to suggest climate change damage to the reef was untrue.

He later seemed to backtrack:

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