WASHINGTON (AP) - Supporters and opponents of President Barack Obama's health care overhaul are making themselves heard outside the Supreme Court this morning, as justices begin three days of hearings to determine the fate of the law.

Dozens of supporters of the law chanted and carried signs that read, "Protect my healthcare." A half-dozen opponents shouted, "We love the Constitution."

People who've been hoping for a glimpse of the historic Supreme Court arguments have been waiting in line all weekend for the relatively few seats open to the public.

The justices allotted six hours of argument time for the case -- the most for any case since the mid-1960s.

Today's arguments will focus on whether the challenge to the law is premature, since the requirement for people to buy health insurance doesn't kick in until 2014.