No one here believes any of them endorse Romney now.
Prove it.
A few years from now, I'm sure the usual folks here will cry about Palin endorsing McCain, yet give pass after pass to those on the list for having 'past' endorsements.
As far as DeMint, though he says he (now) isn't sure he'd support Romney, he certainly had no problem with Mitt throwing a fundraiser for him in October 2009.
Here's my question for DeMint: since your glowing endorsement of Mitt, how has Mitt changed to the point you would no longer support him? I guess DeMint knows that its taboo to support a RINO. So he's trying to distance himself from Mitt.
But, I have no doubt if Mitt runs, and DeMint doesn't, Jim will endorse Romney once again, probably bucking for a VP slot.