Delaware County Democrats and Republicans each have reason for optimism after the May 21 primary. Both parties’ turnouts were significantly higher than in the record-setting 2017 primary, the first election after Donald J. Trump’s defeat of Hillary Clinton in November 2016. Republican turnout was 20% higher than in 2017, while the Democratic vote surged more than 30%. Total turnout was up in 45 of the county’s 49 municipalities.