Conservative Economists on Immigration Reform

I have long been conflicted on the topic of immigration in the US for many reasons. Some of them have to do with my oath-driven adherence to the rule of law. Some are very personal in nature; others, very practical. Notwithstanding my own personal thoughts, I am aware of the view of some who think that immigration reform (using the term in its provocative contemporary sense) could create an economic boon. Among these are economists who are considered to be conservative and are, therefore, in conflict with much of the core of the party they likely vote for come election time. Anyone interested in an open letter which many such economists recently signed advocating for reform (despite being painfully short on details) can find it here.