Warren hosted and moderated a debate. Did he announce that he supported Obama? I remember Libs/Progs being up in arms that Warren dared to ask Obama challenging questions.
He may have asked a challenging question, but he did not challenge any of owebuma's misleading answers.
The comparison in character between McCain and owebuma was stark.
Warren never contrasted them as he should have.
Warren basically whitewashed owebuma, and never took a stand against owebuma's policies and record.
Warren performed the invocation for owebuma, a tacit condoning of owebuma and his radical transformative agenda.
Warren did too much to get owebuma elected, and not enough to prevent his election.
Warren has not spoken out against owebuma, and has not regretted any support moral or otherwise.
If I had to make an educated guess I would say that Warren voted for owebuma, and for whatever reason hasn't regretted it.