The Liberal Arts have absolutely nothing to do with modern progressive politics, or with the fine and/or performing arts. This is an expression with its origins in ancient Greece. The Liberal Arts originally comprised grammar, rhetoric, and logic; later, the great medieval universities included arithmetic, geometry, music, and astronomy. These were the areas of knowledge that an educated man needed to study to train his mind and take part in civil society.
Hillsdale college is a liberal arts school and is anything but liberal.