TY - JOUR T1 - Party Polarization and 'Conflict Extension' in the American Electorate AU - Layman, Geoffrey C. AU - Carsey, Thomas M. PY - 2002 SP - 786 EP - 802 JO - American Journal of Political Science VL - 46 IS - 4 SN - 0092-5853 UR - http://www.jstor.org/stable/3088434 ER -