Jobs are jobs.

finding work is .. finding work.

Unlikely scenario, since most of those jobs are ones most US citizens wouldn't deign to have in the first place ...

While I'd debate that jobs are all equal, I would agree that for a desperate unemployed citizen any job should be better than not earning anything at all. The question there is wether that really is true in the real world and if so, how many are unable to find *any* job at all due to the presence of illegal workers?

Contracting out prison labor

By putting prisoners to work and paying them competitive wages, many private companies are reducing prison costs for the government by withholding earnings for taxes, room and board, Family support, and victim's compensation. Such employment also gives prisoners the skills and work experience that will prepare them for the job market when they are released.

Private business has become increasingly interested in prison labor during the past decade. Prompted by state and federal measures lifting restrictions to private sector use of prison labor, some eleven states contract out the work of an estimated 1,000 convicts. Over twenty firms, ranging from small businesses to multinational corporations, provide jobs for inmates. For instance, Best Western International, Inc, a major hotel chain, employs over thirty Arizona prison workers to operate the hotel's telephone reservation system. Since the Best Western program began in 1981, inmates have paid $182,000 in taxes, contributed over $187,000 to the state for room and board, and paid at least $112,000 in Family support. Similarly, Trans World Airlines, Inc. hires young offenders from the Ventura Center Training School in California to handle over the phone flight reservations. The inmates have paid a total of $13,000 in taxes, $15,000 for room and board, and $11,000 to victims for restitution.

In most cases, the state correctional system provides the working facility for the private firm. The firm manages and trains the inmates and releases their earnings to the care of the state. The wage rates, in most instances, are negotiated between the state agency and the private firm.
.:etc:.

While it's probably true that a Mexican is not
very likely to steal a Corporate Lawyer's Job,
you're not taking into account that someone trying
to support a family by picking fruit might feel
a bit more pressured, esp. if that's the only
work to be found for a hundred miles of his home.

...doesn't even have to be an illegal alien...
in some cases the migrant pickers might even be
a college student on Walk-About that your boss
hires for the duration of the YEARLY HARVEST
willing to work for a $1 less than you can manage on.

True, but I'm under the impression that the percentage of out-of-work citizens actually competing for those types of jobs is relatively small vs. the overall pool of Americans looking for work. Certainly some segments of job-seekers are impacted more than others, but the studies I've read/heard about show the immigrant workforce, both legal and illegal, actually has a net neutral or slightly positive effect on the job market and economy overall ... and that legalizing undocumented workers would provide additional net benefits ...

True, but I'm under the impression that the percentage of out-of-work citizens actually competing for those types of jobs is relatively small vs. the overall pool of Americans looking for work. Certainly some segments of job-seekers are impacted more than others, but the studies I've read/heard about show the immigrant workforce, both legal and illegal, actually has a net neutral or slightly positive effect on the job market and economy overall ... and that legalizing undocumented workers would provide additional net benefits ...

You do not live in the real world if you have to ask the question.