We present evidence of a historic realignment in the relationship betw
een class and voting behavior in U.S. presidential elections in the po
stwar period. We take advantage of recent advances in class analysis a
nd statistical methodology to introduce a distinction between ''tradit
ional'' class voting and ''total'' class voting. Neither shows a decli
ne in the postwar era. The realignment occurred since 1968, as profess
ionals and nonmanagerial white-collar workers moved from voting for Re
publicans to supporting Democratic presidential candidates. Stronger s
upport for Republicans among the self-employed and among managers has
more than offset the shift of professionals and nonmanagerial white-co
llar workers to the Democrats. Skilled blue-collar workers have become
volatile, moving away from their historic support for the Democratic
Party without firmly attaching themselves to the Republican Party Sign
ificant class differences in voter turnout also contribute to the tota
l association between class and voting outcomes.