U.S. Supreme Court to consider the challenge to the Obama health care bill

U.S. Supreme Court has ended the first day of a historic session on the constitutionality of President Barack Obama's signature health care reform.Twenty-six states, the United States has brought the challenge to Republican-led administration law.The Act 2010 extends health coverage to 32 million Americans are expected to , but critics say the requirement that people buy insurance intrudes on civil liberties.A ruling by late June - in the midst of the election season.The Court of Washington, DC, which comprises about 400 people, was packed with lawmakers and senior Obama administration officials and members of the public on Monday.The people have been camping outside the white marble building since Friday.