As state and federal officials await a Supreme Court ruling on a crucial component of the Affordable Care Act, President Barack Obama was expected to tout the landmark healthcare law in a speech Tuesday at the Catholic Health Association. Watch a live stream of his speech, slated to begin at about 11:45 a.m. EDT, here.

The speech was planned just one day after Obama said the Supreme Court case -- a dispute over whether or not people in certain states should receive subsidies for health insurance -- should not have been taken up in the first place. Speaking in Germany after meeting with European officials, Obama said that he expected the Supreme Court to uphold the validity of subsidies to all states and that, if it chose, Congress could eliminate the dispute by passing a single law. The court was expected to issue its ruling by the end of June.

In his remarks Tuesday, Obama was expected to tout the law's concrete successes -- the 16 million who have gained health insurance coverage through the law -- as well as its moral ones: ensuring that Americans have access to health insurance and healthcare. 

The White House has also unveiled a fresh website devoted to the Affordable Care Act and the historical context that demonstrates why its passage and implementation have been critical and unprecedented. It features stories of men and women who finally gained access to health insurance because of it, along with a timeline of more than a century of efforts to reform healthcare in the United States.

If the Supreme Court case rules against the government in the case, King v. Burwell, millions of Americans in up to 37 states could lose subsidies to help them pay for health insurance. The case rests on four words "established by the State," which the law's challengers say mean that only those living in states that created their own health insurance marketplaces, and not those that rely on the federal marketplace, are eligible for subsidies. 

In April, a Gallup poll found that uninsured rates had dipped to their lowest point in years, with 11.9 percent of Americans lacking health insurance, from a high of 18 percent in 2013.