The young son of a woman who has taken refuge in a Chicago church delivered a letter to the White House Tuesday, hoping to enlist President Bush's help in keeping his mother from being deported to Mexico. The handwritten letter, which 7-year-old Saul Arellano gave to a White House staffer outside the gates, requested a meeting with Bush to discuss allowing Elvira Arellano to stay in the United States, said Robert Lopez, spokesman for the Chicago immigration-rights group Centro Sin Fronteras. Saul Arellano, who is an American citizen, traveled to Washington with Emma Lozano, executive director of the group, and...