According to a recent news story, that is what the former head of the U.S. Citizenship and Immigration Services believes. In an interview with the Associated Press, Emilio T. Gonzalez said the next President will need to play an active roll in order for a Comprehensive Immigration Bill to pass. He also said that such a bill would likely fail if left up to Congress
Gonzalez had this to say:
"Immigration is very difficult, and it's very complex. You've got to get dirty, and you're going to get beat up. I can't imagine somebody burning political capital in a honeymoon period tackling immigration."
"I think this will get done when it comes from on high — that is to say when a president really puts it on the line and basically crafts the bill and says: 'Congress, this is what I want.'"
When it came to the impractical solution of deporting undocumented migrants as promoted by anti-immigrant extremists, Gonzalez said that it was "logistically impossible".
The full AP article can be read by linking here