“The order is aimed at cracking down on hiring of illegal immigrants. But people who overstayed visas or came to the country legally but do not have permission to work, such as some students or those awaiting work permits, also could be snagged with the system.”
In other words it might work and properly catch those it should.
No, the order is aimed at trying to enthuse Republican voters before the elections, nothing more, nothing less.
It's just like the Oct 2006 bill to build the fence that was promptly ignored.