I think it is kinda obvious that is what they are doing. They can't say, "hey this Romney guy really sucks and it's a real shame he is a our nominee, but vote for him anyway because at least he is better than Obama". An endorsement like that would obviously hurt more than it helps. Romney is going to be the nominee, there is just no way around that now. All the endorsements at this point are just politicians getting on board and hoping to beat Hussein in the fall.
Only problem is this is exactly the same problem in 2008 when McCain was the guy. We held our noses and had hopes of Palin’s influence and we see where that got us. Countless cries of FReepers saying we will not get fooled again with another McCain, and this is actually worse with Romeny.