When it comes to immigration policy, there isn't much difference between any of the main contenders for the presidency in 2008. Immigration is a "third rail" issue in election year politics, i.e. potentially deadly. These days, it is so contentious and so unresolved in the public domain that a common tactic is avoidance. Either that, or a safe, rehearsed answer that doesn't go much beyond predictable rhetoric. This is too bad, because immigration is among the top foreign policy and national security concerns mentioned by Americans in polls-- along with the economy, Iraq and healthcare.