In a fractious polity, the President could play a key role in deciding which political formation is called to form a government in 2014 if the Lok Sabha elections two years from now throw up a hung verdict.
All bills passed by Parliament must be signed into law by the President.
The President also has the power to return all bills other than a money bill or a constitutional amendment bill to Parliament for its reconsideration – though she or he can only do so once with each bill.
APJ Abdul Kalam returned the controversial office of profit bill – which saves several MPs from disqualification – in 2006 for Parliament's reconsideration.
Though he eventually signed the bill into law after it was sent to him a second time, Kalam's act embarrassed the government.
The President can also delay signing a bill into law.
Results to the Presidential elections will be declared on July 22.
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