Watch | Winter session of Parliament begins with debate on Constitution

The first day of the winter session of Parliament began on a heated note, with home minister Rajnath Singh saying the word 'secular' was the most misused word in Indian politics.He went on to say that Ambedkar didn't find it necessary to insert the word along with 'socialist' in the Preamble because he felt it was already in the basic nature of people. Congress president Sonia Gandhi rejected the notion and said the basic ideals of the Constitution were in danger and the happenings of the past few months were against its values, a reference to the swirling debate on intolerance in the country, stoked by controversial statements by BJP leaders. The session, which ends on December 23, is expected to see fireworks with the government determined to push through its reform agenda, including the landmark goods and services tax bill.