It's estimated to be net negative (more people leave illegally than enter illegally). It peaked late in George W Bush's 2nd term and has been falling steadily ever since, crossing the zero point some time during Obama's admin.
It's an entirely made-up "crisis", but a reliably effective one politically.
Not to mention Obama deported almost 1% of the entire American population (some 2.5M between 2009 and 2015) - more than any other president either in actual numbers or as a percentage of the population.
It's an entirely made-up "crisis", but a reliably effective one politically.