NEW YORK (AP) — Health care is reuniting President Barack Obama and former President Bill Clinton.

The two are set to appear together today to discuss Obama's health care law during a session sponsored by the former president's foundation.

The joint appearance comes exactly one week before people without health insurance can start signing up for health coverage through new insurance marketplaces. It will be Clinton's second effort in recent weeks to promote the 3-year-old law. Congressional Republicans insist it must be repealed.

In a speech earlier this month in Arkansas, Clinton urged opponents of the law to quit trying to undo it and to work instead to improve it.

Obama also plans to promote the law during a speech this week in Maryland.