Rick Perry went into Tuesday night’s debate looking to rattle Mitt Romney — and it worked. Perry’s been under fire for his own immigration record, and resurrecting the 2007 report that Romney had hired illegal workers helped him blunt the advantage Romney had been able to get on the issue as Perry looks to recover from his collapse in the polls. Plus, according to a Perry source, there was an added bonus: by going after Romney personally — the accusation has to do with Romney’s own house — they saw the potential to make Romney react the hardest. And despite...