Turnout among Democratic and Republican voters in Pennsylvania presidential primaries has varied widely in recent decades, from a low of 29% in 1972 to a high of 55% in 1980. A chart showing primary turnout for the office securing the most votes appears below.
Most presidential primaries in Pennsylvania have been noncompetitive, as a result of the selection of two-thirds of convention delegates before Pennsylvania holds its delegate selection primary. Historically, Pennsylvania holds its primaries after a clear presidential front-runner has emerged in both parties. Consequently, Pennsylvania has been relegated to a confirming role. Even with an earlier presidential primary, scheduled for April 4, 2000, Pennsylvania is not likely to play a meaningful role in the presidential nominating process.
The last meaningful primary contest in Pennsylvania occurred in 1976, and was a highly competitive Democratic contest. The Democratic field boiled down to three choices: former Governor Jimmy Carter of Georgia, U.S. Senator Henry Jackson of Washington, and Congressman Morris K. Udall of Arizona. Pennsylvania Governor Milton Shapp entered the Democratic presidential race in September 1975, but was effectively eliminated after meager performances in the Florida and Massachusetts primaries. In fact, no preference received more votes in the Florida primary than Governor Shapp.
Carter won a decisive Pennsylvania primary victory. He won 64 of 67 counties and narrowly lost Philadelphia by a slim 23,000 votes to Senator Jackson. As a result of his victory in Pennsylvania, Carter virtually secured the Democratic nomination and eliminated his main opponent, Senator Jackson, from the contest. The two-party primary turnout increased considerably from 1972 as more than 43% of Democrats and Republicans cast votes in their presidential primaries.
For a complete account of Pennsylvania presidential primaries see Pennsylvania Election Turnout
Percent
Republican Voting of
Highest Office & Democrat Republican Total Voter Percent Voting Age VAP %
Year Vote Used Registration & Democrat Registration Voting Population Voting
1960 1,243,644 President 5,108,090 24.35 5,170,696 24.05
1964 1,993,277 U.S. Senator 5,297,174 37.63 5,361,962 37.17
1968 1,786,155 U.S. Senator 5,144,883 34.72 5,220,878 34.21
1972 1,561,897 President 5,300,439 29.47 5,433,752 28.74 8,207,000 19.03
1976 2,169,322 President 5,023,278 43.19 5,153,095 42.10 8,531,000 25.43
1980 2,810,542 President 5,107,528 55.03 5,328,938 52.74 8,787,000 31.99
1984 2,271,867 President 5,407,103 42.02 5,661,444 40.13 8,975,000 25.31
1988 2,378,239 President 5,128,377 46.37 5,354,310 44.42 9,060,000 26.25
1992 2,322,118 President 5,073,137 45.77 5,323,056 43.62 9,129,000 25.44
1996 1,408,273 President 5,913,676 23.75 6,389,163 22.04 9,161,436 15.37
Sources: Center for Politics & Public Affairs
Pennsylvania Election Bureau
Census Bureau
Federal Election Commission
By: G. Terry Madonna, Director
Center for Politics & Public Affairs