(deyim) Arrange cards or a pack of cards so as to cheat: He stacked the deck and won every hand
(deyim) Manipulate events, information, etc., esp. unethically, in order to achieve an advantage or desired result
(deyim) Arrange things against someone or something. (Originally from card playing; stacking the deck is to cheat by arranging the cards to be dealt out to one's advantage.)
1. I can't get ahead at my office. Someone has stacked the cards against me.
2. Do you really think that someone has stacked the deck? Isn't it just fate?.