Ileana Morales, Associated Press WritersLatinxPoll: Hispanic Immigrants Hold High Hopes for Life in U.S.Marlen Lopez cleans offices in Maryland to pay her bills and hasn’t seen her 8-year-old son in three years after leaving him behind in El Salvador. Yet she is happy with her job and confident her son will one day graduate from college in the U.S.August 17, 2010Page 1 of 1