TY - JOUR T1 - The electoral consequences of issue ambiguity: An examination of the presidential candidates issue positions from 1968 to 1980 AU - Campbell, James E. PY - 1983 DO - 10.1007/BF00988578 SP - 227 EP - 291 JO - Political Behavior VL - 5 IS - 3 SN - 0190-9320 ER -