The libertarian party in the US is basically the GOP by another name (think fascist Spain as it related to Nazi Germany).
Here is the worst example
http://politicsthatwork.com/voting-record/Rand-Paul-412492
"But when someone is said to be shilling for something or someone there is a distinct note of disapproval, and often the implication that the act is somehow corrupt or dishonest, or that the product or person being promoted is not to be trusted."