I don't think that those who are supporting Trump have any idea of comparing him to Reagan.   

I do believe that just like Reagan did in 1980, Trump has identified seriously unhappy 'real people' who believe that the current President and his policies have been wrong for them both economically and internationally.  

Reagan had Jimmy Carter and double-digit inflation and Jimmy Carter and the Iran Crisis to get him elected in 1980.

Trump has people who have seen their personal real economic well-being either stagnate or decline while the rich have gotten richer.   They, rightfully, in my opinion, believe that the professional politicians only care about the rich.

When only 38% currently approve of Obama's Foreign policy  that is consistent with what Reagan had in 1980.

These people are not all right wing nut jobs, just as the Bernie Sanders supporters are not all radical socialists.  They both have identified millions of unhappy voters who both major parties are ignoring.