If her explanation is "well Iwas touting the party line" she looks weak. She would have to say "I studied it further and decided X"
When you speak your own words, without qualifying it with "our team" or "this ticket" or even "Sen. McCain" then they should be taken as your words.
I don't really care she said them because it is a tricky subject but I point it out to show where her supposed purity is not really as pure as you might think and she will have to explain, if she decides to run.
For the record, I don't care if she does or doesn't, although I lean toward doesn't because I want the party to rally around Perry. But if she does, she can only lose ground. It's getting to the point she will appear to be parroting Perry.
How long have you been watching presidential politics? The VP candidate ALWAYS toes the line for the presidential candidate, and is their spokesman on the campaign trail. They can't say anything that contradicts the boss, or they do instantaneous, and significant damage to the confidence of voters and the credibility of the ticket.
Read up on what Palin has said about illegal immigration since being emancipated from McCain.