Immigration Issues

After reading the article on immigration and discuss the following:

1.  What is the main issue with immigration in the U.S in terms of what groups are the biggest problems?

2.  Is their proof that they are draining our social services?

3.  How long would the visa process take if they just waited it out?

4.  Is there are real belief that immigrants from Mexico are taking American jobs.

5.  Should the United States exclude certain countries from being able to come here?

Why? Why not?