The Civil Beat poll surveyed 321 likely Democratic primary voters in Hawaii's 1st Congressional District from May 3-5, 2018, with a margin of error of +/- 5.5 percentage points. The results indicated that Donna Mercado Kim received the highest support at 26%, followed by Doug Chin at 19% and Beth Fukumoto at 11%. The poll aimed to balance results across various demographics, including gender, age, ethnicity, and education level.