Predation

I have always been of the mindset that coyotes kill a large portion of fawns each year.  Many people agree with me, however some studies are showing that they are a deer population control mechanism.  They are stating that the greatest limiting factor on a deer herd is food and its availability.  Therefore, would it be safe to say that if you raise your food sources, your herd should grow as well despite the predators in the area?  I believe this to be an interesting discussion question.  Do you guys feel predators can deplete a deer herd, or primarily just kill the weak?