Santorum is a conservative, so why would he endorse Gingrich?
FIFY
If you think Santorum is a Conservative, in any manner other than his social views you are completely ill informed.
He has no qualms expanding government intrusion in everyones lives for those views, nor spending taxpayer money for graft and endorcements etc etc.
He may not be a communist, but he’s hardly a bastion of conservatism.