U.S. Sailors where common place in Honolulu as King Kalakaua had had given the U.S. a long term lease on Pearl Harbor during his dynasty. They would come ashore every Friday to drill at the old ball field. So the fact that they had set up a small camp was not alarming.  They played NO role in the overthrow.
Two U.S. Presidents turned down attempts by the new Republic of Hawaii Government, that included mostly Polynesian-Hawaiians and whose Speaker of the House was a Polynesian, before a bill was introduced by U.S. Congressman Newlands, that accepted an 1898 unanimously voted on offer from Hawaii.