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SALT LAKE CITY - MARCH 21: Democratic presidential candidate Bernie Sanders gives a fist pump after his speech at West High School at a campaign rally on March 21, 2016 in Salt Lake City, Utah. The Republican and Democratic caucuses are March 22. (Photo by George Frey/Getty Images)

SALT LAKE CITY - MARCH 21: Democratic presidential candidate Bernie Sanders gives a fist pump after his speech at West High School at a campaign rally on March 21, 2016 in Salt Lake City, Utah. The Republican and Democratic caucuses are March 22. (Photo by George Frey/Getty Images)