First she justifies mass immigration with the Social Security ponzi scheme, and now she justifies it with 'competing with the rest of the world.'
Workers in the US aren't supposed to be competing with foreign entities. Extreme free trade enabled by NAFTA and soon the TPP results in easy-moving capital, which results in the upper classes of the US investing in foreign nations where their capital ratios better to the cost of labor. In turn, this results in wages in the United States falling.
tl;dr Competition with Chinese, Mexican, et cet. workers hurts the "proletariat," to use their own ideology, by making labor cheaper
Theoretically, it should be more profitable to produce as close as possible to your market to cut shipping costs, i.e. how much oil is used. Imagine how much oil could be saved if Shillary relaxed environmental restrictions in the US and brought factories back to America, near eliminating the overhead of transport across an ocean and, in many cases, across a continent to the Eastern seaboard.
Hillary doesn't understand that labor is a commodity. By removing an illigitimate portion of the working population, the value of American citizens' labor would increase and, in turn, result in a higher standard of living.
Illegal immigrants have fewer protections under the American courts; fewer labor laws apply to them. As Americans take the now higher paying jobs, the courts and Federal agencies should, theoretically, pay more attention. Politicians like Hillary, however, are the problem; they're in the pockets of big business and refuse to listen to individuals.
Why doesn't she drop some names? It's far easier to say that and have politifact give her a true rating for that statement than give the audience articles to read that loosely speculate on Trump's proposed policy. The details of the policy and the nuances of its execution are so variable that any speculation at this point can't be taken as an accurate prediction.
By elimintating illegal immigrants and their children, more money can be spent on American children's educations, which would result in a higher standard for American education.
tl;dr This woman supported TPP and NAFTA and now wants to pretend that her policies are looking out for the American people, rather than her donor list.
She's not going after the undocumented vote; she's justifying her donations.
Most of what I've said economically is pretty dry. The best economics don't come from Keynes or Psychology-tier majors but something called econometrics; time series, matrices, stochastic models, and CS produce far better predictions than muh Keynes and muh Freshwater economics.
Also, check 'em.