Bill Clinton doesn't know what an embryo is.
Clinton: "...we're not taking embryos that can - that under any conceivable scenario would be used for a process that would allow them to be fertilized and become little babies..."
Clinton: "...he has apparently decided to leave to the relevant professional committees the definition of which frozen embryos are basically going to be discarded, because they're not going to be fertilized."
Clinton: "...any of the embryos that are used clearly have been placed beyond the pale of being fertilized before their use. There are a large number of embryos that we know are never going to be fertilized..."
Clinton: "...any embryos where there's any possibility, even if it's somewhat remote, that they could be fertilized and become human beings."
Just to make sure we're clear, here is the definition of an embryo from WebMD: In humans, the developing organism from conception until the end of the eighth month; developmental stages from this time to birth are commonly designated as fetal.
And to make sure we don't have a "it depends on the definition of is" moment, here is the definition of human fertilization from Wikipedia: Human fertilization is the union of a human egg and sperm, usually occurring in the ampulla of the fallopian tube. It is also the initiation of prenatal development.