The heart and soul of Conservatism is libertariansim.
No Republican presidential nominee since Reagan believes this. Not one. There is no evidence the Republican Party believes it.
You have a party that is off track and has been for some time.
A Republican nominee has not broke 300 electoral votes since 1988 -- and the 1988 result was not due to the person running at the time, but to the man finishing his second term.