Also if the democratic leaders have not reached a compromise to pass CIR or DA with republicans, then in my opinion ( i am not really an expert, so take it with grain of salt), the less immigration reform is in the center the better.

At least for now, until some primaries are settled. Some of these republican primaries are very close. It is between a republican challenger who supports immigration reform Vs one who does not. If immigration reform is at the spot light then anti-immigrant groups will probably be more mobilized and motivated to make sure some one that is anti immigration to get elected.

My guess is that right after primaries are done, we might hear much more about immigration reform.

Right now the democrats are doing the politically right thing. They are trying to tackle Climate/energy bill that in future will probably have much lower chance of passing and then they are gambling in the primaries and the 2010 election for immigration reform.

These are my take and my opinion on why things are happening the way they are.