WASHINGTON (AP) — President Joe Biden had a question.

“Is it true?” Biden asked Sen. Alex Padilla, referencing the roughly 25% of U.S. students in kindergarten through high school who are Latino. Padilla said the question came as he was waiting with the president in a back room at a library in Culver City, California, before an event in February.

It was exactly the kind of opening Padilla was hoping to get with the Democratic president. Biden was weighing his reelection campaign, executive actions on immigration and what to do about a southern border that has been marked by historic numbers of illegal crossings during his tenure.

Padilla wanted to make sure Biden also took into account the potential of the country’s immigrants. “Mr. President, do you know what I call them, those students?” Padilla recalled saying. “It’s the workforce of tomorrow.”