Reagan had a sort of conservative populist approach. Obviously, populism can just be a matter of using the mob (stirred up by free goodies) to enact one’s oppressive policies, but I think a conservative populism - that is, a campaign based on the issues that concern people who work for a living, such as taxes, crony capitalism and government corruption, Obama’s destruction of their health care, etc. could work.
Conservative populism would consists of something like “I’m going to get the government off of your backs”.
That would appeal to a LOT of voters. Particularly younger ones with a Libertarian streak. But I’ve not heard any politician utter them since Reagan wrote his touching “goodbye letter”.