Back at home, the state Republicans' dominance of Wisconsin politics began to wane during the second half of the 20th century, with the party now regularly alternating and sharing control with the state's Democrats. Several Republican governors were elected during this time, most prominently Walter J. Kohler, Jr. and Warren P. Knowles, both of whom were of the more moderate wing of the party. At the federal level, with the exception of U.S. Senate seats following the death of McCarthy, the Republicans continued to hold an edge. Between 1952 and 1972, Wisconsin voted for the Republican candidate in each presidential election except for 1964.