The United States is a land of immigrants. Our rich cultural heritage is very much part of what makes us a great nation. Many immigrants currently working illegally in the U.S. provide cheap labor and this can adversely affect our economy. It makes sense to provide a path for these people to get work visas or work toward gaining citizenship through U.S. citizen sponsors.
Some people may feel threatened by newcomers. Attacking immigrants is, of course, not the answer. A way to address the situation is to examine the causes of increased immigration. People are often displaced by U.S. backed wars and U.S. trade agreements. and they come to the United States hopeful for better conditions.
U.S. Free Trade agreements can adversely affect the local economies of our trading partners, putting farmers and small business owners out of work, forcing them to seek low-paying employment with multi-national corporations, like GE, Walmart, IHOP and etc, which drain the local economy of wealth and force more people to migrate.
U.S. military involvement in foreign affairs has displaced millions of people in recent decades and they are forced to seek refuge elsewhere. Ending the sale of U.S. produced weapons overseas might help reduce the number of people fleeing from war torn countries.