Maybe you're too young to remember, but a conservative platform did very well in 1980, in 1984, and again in 1988. Very, very well. Landslide-victory type well.
1980 was a powerful rejection of Carter and the dems. 1984 was a powerful conservative victory, but the electorate kicked the GOP out of power in the senate two short years later. 1988 was a third term for Reagan that didn’t materialize.
1984 was a long time ago. The country isn’t as conservative as it was back then, sorry.