It depends on who you ask. 10 years ago, it was mostly classical liberals that defected from the Republicans after the GOP started focusing their messaging on rallying evangelicals. Within the last couple election cycles, which IIRC is right around when they got close to having good enough poll numbers to get in a debate, the loudest group in it became ANCAPs who fight with each other about who’s actually extreme enough to earn the libertarian title.
It depends on who you ask. 10 years ago, it was mostly classical liberals that defected from the Republicans after the GOP started focusing their messaging on rallying evangelicals. Within the last couple election cycles, which IIRC is right around when they got close to having good enough poll numbers to get in a debate, the loudest group in it became ANCAPs who fight with each other about who’s actually extreme enough to earn the libertarian title.