SANTA FE, N.M. — Michelle Obama plans to address 105 Native American high school graduates today during a commencement speech that comes as she tries to spotlight the plight of tribal youth.

The first lady’s commencement address at Santa Fe Indian School is being delivered as part of an Obama initiative that aims to remove “barriers to success” for Native American youth — a group the White House says make up the nation’s “most vulnerable population.”

The graduates — who played a part in inviting Obama — said they expected uplifting, empowering remarks from the first lady on their big day.