Phoenix Mayor Greg Stanton hand-delivered a letter to President Barack Obama from a Phoenix "Dreamer."
The president visited Arizona to make a speech about housing and the economy.
Obama landed aboard Air Force One at Sky Harbor International Airport in Phoenix shortly before noon Tuesday.
Stanton and Gov. Jan Brewer were among several officials who greeted Obama on the airport's tarmac.
He presented the president with a letter from a Tony Valdovinos, a "Dreamer" who is among the 300,000 young people who are now able to work in the United States as a result of the Obama administration's "deferred action" initiative.
In the letter, Valdovinos thanked Obama for helping people like him live without fear for the first time in his life and turning "Dreamers" into achievers.