Pros and Cons of Immigration within the US?

I'm writing an essay, what are the pros and cons of immigration.
I know some pros are that people who hire them can get good work for low income while some cons are that some immigrants just mooch off the senate and Americans while they dont pay taxes.
Answers:   
This link is full of information on all fronts of the immigration problems this country face.
Please remember that nothing good can come from anything ILLEGAL, including immigration.
The first thing you obligation to do in your essay is clarify the difference between legal (or documented) immigrant and illegal (or undocumented) immigrant. There are in reality very few issues/problems with legal immigrant, and they are overwhelmingly accepted here.

Legal immigration is necessary. It keeps our country growing, brings contained by new ideas and educational background, etc. Our nation has been founded on this since the inception of the United States.

As far as low pay, to be precise mostly referring to illegal aliens. Since they are not on the books, they will work for lesser wages. The unscrupulous culture who hire them enjoy paying lower wages, and also can avoid insurance premiums and other costs. There are also instances of identity theft, and they do not pay into the due base at the same rate as someone who is legally authorized to work within the U.S. Sure, they pay sales tax, but they do not reward taxes on wages. A person who is legally here has an ITIN, which allows employer to withold taxes (and legal residents are eleigible for some benefits, too). Legal immigrants are contributing and sharing the tax burden along near the rest of the citizens.
Everyone in the entire U.S. has to pay taxes. If you walk into a Supermarket or just anywhere they do not ask you are you if you're illegal and if you are you don't pay any taxes, right. If someone is working near a social security number the government will deduct taxes from that number thru the entire year. At the cease of the year that person cannot do their taxes and cannot claim because it's not his. Now who keeps that money? You don't, I don't then who? Answer: The political affairs. A lot of people are ignorent because they think that way. purloin the time to investigate the true facts of questions that you have. It will make you a smarter and a better party because you know the entire truth not just what you hear or other people tell you. One later thing, illegal inmigrants take the job that no one wants. Can you see your mom and dad working in the field everyday from dusk until dawn? I don't think so. Those so call "illegals" own families to support and believe it or not have rights also. They have the guts to work that tricky for a lot less pay and they do not complaint and if they do they might gain deported, thrown in jail or just acquire terminated.

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