A man protests against the healthcare legislation in Washington (Nov 2010) The healthcare reform has divided US public opinion
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Republican leaders have begun a bid to overturn the healthcare law signed by US President Barack Obama in 2010.
A bill to repeal the landmark law was formally unveiled on Monday evening, two days before Republicans assume control of the lower house of Congress.
It is set to be voted on by the House of Representatives on 12 January.
But the vote is expected to be largely symbolic as Democrats retain a Senate majority and can block the move and the president could ultimately veto it.
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