Romney has come substantially towards the conservative position on amnesty. Moreover, he will not try to estrange himself from conservatives as president on immigration. McCain is happy to triangulate himself between conservatives and the left. This often puts McCain on the left.
Triangulation McCain is not someone conservatives want as a leader. He is someone who is actively against us. We should vote for Romney who has campaigned as the conservative candidate. Romney is perfect as Lawrence Auster points out.
This has become a 2 man race for the Republican party. Huckabee is simply a stalking horse for McCain in effect. So its time to make a choice for conservatives, and that choice is Romney.