When the Democrat leadership argues for "comprehensive immigration reform" they are shooting down separating skilled from low-skilled immigration.
"Senate lawmakers who are most involved with immigration legislation--the so-called Gang of Eight--would prefer to see a comprehensive deal. That's also the position President Obama has taken. The trick lies in corralling enough Republicans to support a total-package process, as opposed to striking a set of smaller agreements. Carving out skilled immigration might lead to an easy bipartisan win, but it would give ammunition to piecemealers and risk fracturing the Gang of Eight."
http://www.theatlantic.com/politics/archive/2013/03/democrat...
I disagree. I think that a lot of politicians would refuse to sign any legislation with the words "permit" and "immigrant" in them. The public at large as misinformed enough that they're probably right to do so, too, if they want to be re-elected.
It is this conflation that hurts the legal immigrants the most. I believe if a bill was introduced to reform the legal immigration process to permit more highly skilled workers to immigrate more easily, neither of the houses (nor the public) would have a problem with it.