The president's populist push on his signature issue came two days before a planned climactic vote in Congress. The House of Representatives is set to vote Sunday on a sweeping $875 billion reform plan that cleared the Senate in December, as well as another $65 billion of compromise changes to the measure.
"In just a few days, a century-long struggle with culminate in a historic vote," Obama declared at a campaign-style event at Virginia's George Mason University. "If you believe that it's right, you've got to help us finish this fight. ... The time for reform is right now."
If the Senate bill passes the House, Obama will sign it into law. If the package of changes is passed, it will be taken up by the Senate.
Obama warned that if Congress rejects his plan, "the insurance industry will continue to run amok."
Updated: 5:25 p.m.