Give a major speech in prime time. Say that you still think that a long-term solution to the immigration issue should include a guest worker program. Acknowledge, however, that many Americans disagree and there is currently no consensus on a long-range policy. Say that, more fundamentally, you’re now convinced that our first priority has to be getting control over our borders. Until we control our borders, and know who is coming and going, any immigration policy we may announce will be meaningless anyway.
Expect this to figure prominently.
We’ll have video highlights here, of course.
Update: He didn’t have much choice, really. We’ve reached critical mass.