How did the sinking of the lusitania in 1915 affect world war 1?

America refused to recognize the right of Germany to declare unrestricted submarine warfare and continued to ship war materials. ... When the Germans sunk the Lusitania American civilians were killed in the "unprovoked" attack. The outrage over this atrocity provided the reason for America to enter the war.

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true

explanation:

during the 20th century, the role of the vice president has evolved into more of an executive branch position. now, the vice president is usually seen as an integral part of a president's administration and presides over the senate only on ceremonial occasions or when a tie-breaking vote may be needed.