"While agree our immigration laws need to be fixed, we are deeply concerned about the potential expansion of deferred action or parole for a large illegal alien population. While deferred action and parole are Executive Branch authorities, they should not be used to circumvent Congress' constitutional authority to legislate immigration policy, particularly as it relates to the illegal population in the United States."

"We would appreciate receiving a commitment that the Administration has no plans to use either authority to change the current position of a large group of illegal aliens already in the United States, and ask that you respond to us about this matter as soon as possible."

OMG, they've got to be f****ing kidding!!!! And this is from a group of Senators that had to include a holier-than-thou, prostitute-seeking philanderer (Vitter)

This is the way I read it: "Mr. President would you promise us not to use the power bestowed upon you and the Executive Branch by the Constitution to fix a problem that we as "lawmakers" have no intention to fix? Please, please do not make this issue go away, because we plan to continue to exploit the vulnerable for months, and if we can, years to come for fundraising and for opportunities to seek office in regressive, Tea-party states like Arizona. Don't you dare use all the legal tools available to your administration to tackle this problem, we want to be able to tell you how and when to do it. You're no Bush, you know, and you don't look like us, so don't pretend that you can just sit at your desk and sign orders as presidents past have done, like invading countries and waste trillions of hard-earned taxpayers' money in enriching military/industrial croonies. That is our job. Also, you speak clearly and we cannot understand you."

To which President Obama should say: "You will respect my authority". Sign.