SAN DIEGO — Carlos Gonzalez has lived nearly all his 29 years in a country he considers home but now finds himself on the wrong side of the border — and the wrong side of a proposed overhaul of the U.S. immigration system that would grant legal status to millions of people.

Gonzalez was deported to Tijuana, Mexico, from Santa Barbara in December, one of nearly 2 million removals from the United States since Barack Obama was first elected president.

"I have nobody here," said Gonzalez, who serves breakfasts in a Tijuana migrant shelter while nursing a foot that fractured in 10 places when he jumped the border fence in a failed attempt to rejoin his mother, two brothers and extended family in California. "The United States is all I know."