A few things to keep in mind.
1. The population of the state of Hawai’i is highly concentrated with 72% on O’ahu and 28% on all of the other islands.
2. There are 2 congressional districts in Hawai’i. One is entirely on O’ahu. Hers is the other and covers about 30% of the population on O’ahu and all of the other islands.
3. I’m frankly quite surprised to see how the difference between urban and rural areas for voting this month on the presidential election was insignificant in Hawai’i. Most everyplace in the islands are quite rural except for in the towns and the only really urban place is Honolulu. However I see that Hillary got 63.6% on the Big Island while getting 61.6% on O’ahu. http://www.politico.com/2016-election/results/map/president/hawaii
4. Why I’m shocked is because:
a. Rural areas throughout the USA tend to be better for the GOP than urban areas.
b. With rising real estate costs the people who are moving to Hawai’i tend to be only those who have a lot of money. And anyone who can accumulate money certainly learns about how federal income taxes, Social Security taxes, Medicare taxes, state income taxes, unemployment taxes, “health care responsibility” fines, rules/regulations, etc. can suck your income and assets dry so when Election Day comes they tend to vote more for candidates who are going to reduce, not increase, the legalization of government plunder/control of our lives.
5. Just a personal anecdote here - I was on the Big Island during the weekend before the election. I saw plenty of Tulsi signs all around. I saw one sign for a local race that made me laugh. It said “Make Hawai’i Great Again” :)
Tulsi’s district is the islands other than Oahu and her part of Oahu are the coastal areas away from Honolulu.