What political concerns or benefits caused the United States to enter Hawaii?

From a geopolitical perspective, the United States wanted Hawaii as a naval base that would allow the Pacific Fleet another coaling base.  The United States hoped that it could cash in on what was supposed to be a lucrative market in China.  Alfred Thayer Mahan's book The Influence of Sea Power upon History: 1660-1783 stated that throughout history, all great nations had great navies.  The navy was needed to patrol sea lanes and ensure that trade stayed open.  This book was quite influential in both the United States and Europe and led to several nations building large fleets of battleships.  
There were also sugar and pineapple concerns on the island of Hawaii.  Since Hawaii was a foreign country before the overthrow of the queen, American plantation owners had to pay a duty to get their sugar and pineapple into the United States.  The plantation owners overthrew the queen and asked to join the United States as a territory.