Today could be the beginning of the end of Obamacare: Everything you need to know

The fate of the Affordable Care Act, the president's signature domestic policy achievement, is once again in the hands of the Supreme Court on Wednesday. The justices will hear oral arguments in King v. Burwell, a challenge to the financial assistance that millions of Americans are receiving to purchase health insurance. The case is considered the greatest threat to Obamacare's future since the court considered a challenge to the law's individual mandate three years ago.