While it's become routine for Michelle Obama to discuss childhood obesity and nutrition to groups across the country, she made a new pitch Tuesday  to the National Council of La Raza: Sign up for health insurance this fall.

Speaking at the group's annual conference, the first lady urged attendees to get young people and anyone else to register for insurance starting Oct. 1, when the federal health-care law known as "Obamacare" enters its next critical stage.