When you're elected to Congress, you take a vow to uphold the Constitution and its system of checks and balances. That vow doesn't say, 'Unless it's politically uncomfortable.'
I think most of us in America want our security. There're so many people out there that are fearful and now with this realization of immigration, with the terrorists, we need to have better checks and balances in regards to who's emigrating into our country.
Politicians, in many cases - their moral code will be dictated by what can get them reelected, what they can get away with. When you're out of office, I guess you're freed from those checks and balances.