Washington (CNN) - First lady Michelle Obama faced a tough policy question Wednesday from an unlikely source - a second-grader.
During a visit to a Washington-area school with Mexican first lady Margarita Zavala, a student concerned about her mother's legal status asked Michelle Obama about her husband's immigration policies.
"My mom said, I think that she says that, Barack Obama is going to take away everybody that doesn't have papers," the young girl told the first lady.
The unscripted moment was sandwiched between examples of Michelle Obama's signature policy initiatives - a lesson on healthy eating and an exercise session - and forced the first lady to walk the fine line of immigration reform policy language.
"Yeah, well, that's something that we have to work on, right? To make sure that people can be here with the right kind of papers, right? That's exactly right," she said.
The girl replied, "But, my mom doesn't have any."
"[W]ell we have to work on that, we have to fix that and everybody's got to work together in Congress to make sure that happens. That's right," Obama said before moving to the next question.
Dana Tofig, a spokesman for Montgomery County, Maryland, schools, said the district would not identify the student and does "not ask about the immigration status of our students and their families."
"There was a Supreme Court decision that makes it clear that if there's proof of residency in the county, then we educate the child," he said.
"And we're not going to identify the student or her parents," he said. "We protect the identity of our students."
The exchange happened in a school gymnasium, but immigration took center stage in Washington on Wednesday as President Obama welcomed his Mexican counterpart, Felipe Calderon, to the White House.
Both leaders used the occasion - the fourth time they have met for bilateral talks - to take sharp aim at Arizona's controversial new law meant to crack down on illegal immigrants. Calderon characterized the measure as discriminatory; Obama called it a "misdirected expression of frustration."
Obama also repeated his call for comprehensive immigration reform.
Updated: 8:52 p.m.