A fusion with libertarianism, this type emphasizes a strict interpretation of the Constitution , particularly with regard to federal power . Libertarian conservatism is constituted by a broad, sometimes conflicted, coalition including pro-business social moderates, those favoring more rigid enforcement of states' rights , individual liberty activists, and many of those who place their socially liberal ideology ahead of their fiscal beliefs. This mode of thinking tends to espouse laissez-faire economics and a critical view of the federal government. Libertarian conservatives' emphasis on personal freedom often leads them to have social positions contrary to those of social conservatives, especially on such issues as marijuana, abortion and homosexuality. Ron Paul and his son Rand Paul have been influential proponents in the Republican presidential contests.