It's called the coup d'etat. The holder has the power to overthrow the HOH and change one or both of the nominees. Sweetheart since your hoh and jb since you won the pov. Both of you are safe. Everyone else is eligible.
It is nothing personal and I am doing what is best for me in this game. With that being said I will take both nominees off the block and replace them with Mikey and giantsfan. Sorry guys. Good luck