The Tea Party proved that assumption wrong in 2010 but if you are talking only about presidential politics it is hard to tell if that is currently true since we haven't had a real conservative win the GOP nomination since Ronald Reagan.
Now HE certainly resonated with the voters.
There is one guy running that wants to knock off that socialist **** and allow “Right to work”
There is on guy that wants to reign in the FED and the EPA.
The 2010 Tea Party victory was a reaction against “The Divine One” a revulsion if you please. It may not have been due to an acceptance of “the message.”