The skeptic in me says he vetoed it as political cover, expecting his veto to be overruled.
Eh? A governor's veto has only been overruled twice in the history of the state. Where did you think the support is to overrule this one?
Per the article, the bill passed the state legislator with "overwhelming" support, which tells me that there would be enough support for a veto override; although I have to admit, I didn't look up the actual vote tally and compare it to the vote tally required to override a veto.