The authors examine the impact of political party control of government on the restrictiveness of a U.S. state's abortion policy, measured by the enactment of a parental involvement law. The empirical results show that (1) institutional control of a state's legislative and executive branches of government by the Republican Party increases the likelihood a state will enact a parental involvement law, while Democratic Party control decreases this likelihood; (2) the more conservative state public opinion is on abortion rights, the more likely a state is to enact a parental involvement law; (3) public anti-abortion attitudes do not act as a moderating force on the link between political party control and the enactment of a parental involvement law; and (4) the impact of political party control on the enactment of a parental involvement law has grown larger over time.

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