Complex sentence: The Democratic Party in Eastern and Midwestern cities had a strong German-American base, German-Americans, who were mostly economic conservatives, showed little enthusiasm for Bryan; their distaste for the platform overcame fears that a Republican victory would lead to prohibition of alcohol.
Split into simpler sentences: The Democratic Party in Eastern and Midwestern cities had a strong German-American base. Conservative economically, German-Americanshowed little enthusiasm for Bryan, although many were worried that a Republican victory would lead to prohibition of alcohol.