Jimmy Carter did this in an attempt to prevent the election of Ronald Reagan.
Do you have a link to this? I was going to post it but couldn't find the original but I recall reading it within the last month. Amazing stuff but I suspected it at the time.
Another poster hit the nail on the head recently when he wrote that the Democrats are actually engaged in a civil war against Republicans. I'm beginning to think the only people who don't know it are the Republicans like Orrin Hatch.