For what reason did the united states insist on a broad definition of neutrality after world war i broke out in 1914?

The reason why that the United States insist on a broad definition of neutrality after Worl War 1 broke out in 1914 is that because the nation benefited financially from such an expensive interpretation. Arguing that neutral nations should allow to trade freely with belligerents, send ships through the seas. Keeping America's European trade was the very important in 1914.