This comes from the show Ugly Betty, season 4, episode 1-2. Betty is cooking some kind of muffins for her co-workers hoping it helps her to break the ice. Hilda's boyfriend Archy who is some kind of politician is supporting her on this. Archy: "Food can be very effective. The more I have at my compagn rallies the higher the spike in my polls." Could you tell me what he means by "spike" here? Thanks!