Many estate tax planners are worried about the effect a repeal would have on charitable giving (see story below).
In this story, there was also quote from a lawyer saying that "Some studies suggest that repeal would decrease the amount given at death, while others seem to show that by removing the tax burden, there may be more discretionary assets available for planned giving." (Emphasis added)
This is a very standard kind of statement made by people who wish to deny the harmful affects an estate tax repeal would have on charities.