The Supreme Court is about to make a decision on President Barack Obama’s health care overhaul, also known as "Obama Care."

Most of the law’s major changes aimed at extending health insurance to more than 30 million Americans who now lack coverage have yet to take effect, including the requirement that most people have health insurance or pay a penalty.

According to a recent Associated Press-GfK poll, just one-third of Americans back President Obama’s health care plan.