Its not an endorsement but a strategic one for S.C.
If you’ve been listing to Sarah in recent interviews she’s been hinting that something (info) is going to come out about a candidate to make them look at another candidate. She has a plan but what it is isn’t exactly clear
She has been saying for weeks about Romney’s tax returns..maybe she has been tipped off there is something juicy and scandalous in there that can take Romney down. Romney refuses to release them(Kind of like Obama refuses to release his college transcripts/thesis) there must be some very interesting goodies in those tax returns.