LA Times:

For the first time, racial and ethnic minorities make up more than half the children born in the U.S., capping decades of heady immigration growth that is slowing.

New 2011 census estimates to be released Thursday highlight sweeping changes in the nation's racial makeup and the prolonged effect of a weak economy, which is resulting in fewer Latinos entering the U.S.

...Minorities made up roughly 2.02 million, or 50.4%, of U.S. births in the 12-month period ending July 2011. That compares with 37% in 1990.

The only thing that has slowed down this process, this transformation of the racial composition of the richest nation, is the long recession, which for many minorities is a long depression. If the economy recovers, this process will be reenergized.