 An opposition movement led by the Prince of the Blood Antoine of Navarre, King of Navarre, contested their power.Some theorists, such as François Hotman, believed that the law entitled the latter to be the king's senior adviser since he was a descendant of Louis IX of France and thus an heir to the throne if the House of Valois then in power disappeared.However, Antoine failed to prevail against the Guises when he came to court.