Complex sentence: In 1894 Dahlman was a lieutenant in Bryan's re-election campaign, and when he became chairman of the Nebraska Democratic Party in 1896, Dahlman used his platform to nominate Bryan to run for President of the United States.
Split into simpler sentences: In 1894 Dahlman was a lieutenant in Bryan's re-election campaign. When he became chairman of the Nebraska Democratic Party in 1896, Dahlman used his platform to nominate Bryan to run for President of the United States.