This may sound funny but immigration is experiencing a bubble as well. The construction, landscape and other industries that employ illegal labor are also experiencing hard times and people are going home.
USCIS raised fees in a downturn and after a rush of people applying for citizenship to vote in the election there should be a sharp decrease in applications. There is an assumption that there will be some type of immigration bill, but I am leery. In a downturn where people are fearing for their jobs passage of an immigration bill may not be a slam dunk.