Illegal aliens were encouraged for decades in parts of our country. They have been an important part of the work force where I live and have been here since the 1970s. Ronald Reagan gave amnesty to millions and sent the message that it was ok to illegally immigrate. If you bar the workers that have been been here you are cutting us short of the experienced workers. It seems that an enhanced identification system and fines for hiring illegals would be more effective. This would force proper documentation. By the way, Americans, generally speaking, haven't wanted to do field or orchard labor for many years.