I don't think even hardcore lefties use language this evocative to describe the xenophobes:
Mr. Boehner urged patience, saying there was a “narrow path” to get something done, despite opposition in his party from what Republican aides call the “boxcars crowd,” a reference to conservative members who favor deportation for most of the 11 million.
Wow. That's harsh ...
I knew Laura Ingraham and her pals all would like to see us build a Berlin Wall at the border but I didn't know they wanted to round up undocumented workers and load them into boxcars. Although now that I think about it, it makes perfect sense what with all the talk of them "destroying our way of life" and "ruining the culture" etc, etc.