Democrats, why not look towards Tom Harkin?

Why can't the Democrats in the House who are arguing for Michael Schiavo's (who suddenly "remembered" some alleged wish from his wife Terri (I'm not sure whether Michael had had children by another woman yet at that point...)) ability to continue making his wife die a slow and painful death look towards Senator Tom Harkin? Tom Harkin is a Democrat who said in a conference last night that he never thought about these issues before. Tom Harkin is for helping Terri. Where are some of the Democratic House members?