The meme shows a crowded political-event scene with a woman speaking at a podium on the left and Donald Trump standing on the right, eyes closed with a solemn, almost reverent expression. Large white meme text labels the woman/podium area as “Chocolate cake at the grocery store” and labels Trump as “People on a diet.”
The framing makes it look like the person labeled “People on a diet” is intensely aware of, or emotionally affected by, the “Chocolate cake” nearby. The busy rally background adds drama to what is really a simple grocery-store temptation joke.