He said the reasons were firstly practical, because for example if a person's entitlementtovote was based on Scotland being their birthplace a whole new electoral register would be needed.
What the Senate vote shows is that the newest entitlement is far more vulnerable than the political class claims to believe, especially once people see its consequences in practice.
For instance, Murray offered up Ryan's budget for a vote, forcing Senate Republicans to say whether they are for or against the deep spending cuts and entitlement changes in his plan.