Affiliate Marketing Secrets

So, in most places that I read about the escalating problem of illegal immigrants in our country (I’m aware it’s been like this for quite a long time and it’s not a recent thing), I really don’t know what to believe since a lot of people affiliated with the both the Democrat and Republican parties both seem intent on spreading as much misinformation as possible about how illegals really affect our country. What I want to find out is what are the actual pros and cons of allowing them to continue to stay here. For me personally, it doesn’t make sense to let all the needy coming in from all these different countries sneak in and we get to take care of them when our own people and economy need to be taken care of. Also, it just seems like a slap in the face to the immigrants who persevere and come in legally and when illegals put their personal (sometimes incredibly saddening) situations above our own system and laws, it just diminishes the value of those laws we put in place and makes it seem like big joke that we even have them in the first place.
Despite how it affects me emotionally, I appreciate the truth and facts a lot more so I can think rationally about it. So, what are the real pros and cons of the current presence of illegals in our country? How does it benefit the Democratic and Republican parties? How does it benefit the American people as a whole? As for a solution, I’m not really sure what will eventually happen, but it needs to happen fast. The situation is getting way out of control all the while Congress bickers and points the finger of blame at each other and neglecting to just sit down with each other and form a solution that every one can agree and compromise on. What would be your solution to the immigration problem?
P.S. If it means anything, you could consider me an independent (though I don’t really care for labels much). Also, if you’d be so kind as to provide sources for any claims you make, that would be much appreciated.