Just after my OP, I got another taped call. Entirely different voice and script, but both calls encouraged me to vote for Rick Sanctimony.
The 2nd call incorporated a voice loop of Romney repeating "bankruptcy", the same as a TV ad that's been running regularly. But the TV ad is for Santorum, and both calls alleged to be enouraging "spoiler" votes by Democrats. If I was stone dead certain Santorum would be unelectable, I might go for it. But I think I'll pass. Nixon had to be unelectable the 2nd time, with Watergate falling apart around him, but...