That's not what I asked. I didn't ask why an executive order is necessary. I asked why immigration reform itself is necessary.
Essentially, why do we need to change from the status quo?
Mostly this. While there is much about the immigration status quo I do not like, the solution here is for Obama to negotiate with GOP in the Senate and House to get a deal. If the GOP attaches conditions Obama will not accept he should then run on the issue in the upcoming elections and let the electorate give their input on the issue. What Obama seems to be doing is the exact opposite. He is avoiding the issue in the 2014 elections (I think he is wrong here as well as I actually doing this will demotivate the Dem base and does not do the Dems any good) for some undefined unilateral executive action that he might take after the elections. A unilateral executive action now actually makes more sense in the sense that the electorate can give their input on how they feel about these executive actions as to guide Obama and future administrations input on how to handle these types of situations.