Mexico City ? Mexico’s Congress was swayed Tuesday by a 7-year-old boy on a mission to save his mom.

Second-grader Saul Arellano, a U.S. citizen, appeared in Mexico’s 500-member Chamber of Deputies to plead for help in lobbying Washington to stop the deportation of his mother, an illegal immigrant who has taken refuge in a Chicago church.

His efforts paid off with a resolution calling on the Bush administration to suspend the deportation of Elvira Arellano and any other illegal immigrant parents of U.S. citizens.

U.S. officials say there is no right to sanctuary in a church under U.S. law and nothing to prevent them from arresting Elvira Arellano, 31, who has lived at the church since Aug. 15, the day she was supposed to surrender for deportation. So far, they have not moved to seize her.