There was no 'end' from it. Voters did not switch from Carson to Cruz because of the CNN story - the source of which came from the Carson camp.
PROVE IT!
It is not how much who hauled out of the bank that counts,
it is the attempt to rob the bank is what counts.
It was patently immoral to spread the rumor about Dr. Carson quitting the race. Whether it was fruitful or not is not relevant.
If a burglar breaks into a house to steal, and goes out empty handed, it is still a crime.