This is how politicians get to have their cake, and eat it, too.  She can tell her party leadership that she ensured DeVos would be confirmed (on a 50/50 vote, with Pence as tie breaker), but can still tell her constituents that she voted against the confirmation.  If she REALLY wanted to block this confirmation, the appropriate approach would have been to block it from being voted out of committee.  Politicians of her stripe sicken me.