Chris Matthews said on “Today” this morning that pushing embryo-killing stem-cell research is a “slam dunk” for the Democrats, since people with diseases “don’t want to be told by Laura Bush” that research isn’t promising when they’re ill. He said it was morally complicated, but politically obvious. In a half-decent segment that made the right distinctions about federal funding and embryo destruction, Matt Lauer showed that an Annenberg survey found great support for stem-cell research, even among Republicans. And were the polling victims told about the embryo destruction?