Philippines' Duterte threatens to jail critics in China row

<p>PHILIPPINE President Rodrigo Duterte has threatened to jail critics if they try to impeach him, as he faces accusations of defending Beijing after a boat crash in the disputed South China Sea.</p> <p>Duterte enjoys firm popular backing but his setting aside of the standoff with China over the resource-rich waterway is criticised as weakness by some in the Philippines.</p>

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