Why did the united states need more raw materials in the late 1800s? what would have happen to the u. s economy if we had been unable to meet our needs for raw materials and markets? how do national interest's and foreign policy relate to one another? how did the open door policy impact our trade with china? why did it take the u. s five years to annex hawaii after queen liliuokalani was deposed? why did the u. s need the panama canal? how did the u. s finally get permission to build the panama canal? was this appropriate? what new problems arose for the united states after we acquired these new territories? was it worth it?