Treasury Undersecretary Lael Brainard will try this weekend to soothe the fears of the world’s major economic powers about the “fiscal cliff” facing the United States.

Brainard, who is attending a G-20 finance ministers meeting in Mexico City, is prepared to be pressed for information about how the U.S. will deal with the slew of spending cuts and tax increases that are set to begin in January.

The policy changes in the fiscal cliff are expected to push the U.S. into recession in 2013 unless Congress acts quickly. That has foreign leaders concerned about a spillover effect that could drag down the entire global economy.