The Republicans originally were an amalgamation of the Whigs, the abolitionists and the Know Nothing Party anti-immigrationists. After the Civil War, they were the party of the Robber Barons. Then they were Isolationists. Now they favor free trade and an end to import duties. So they have someone that will actually vote for them, they attract the goobers with anti-abortion, anti-immigrant, lumpenproletarian union-busting rhetoric.
There have been many changes in the makeup of the party, but the retail business class Whigs have been a constant element.
Eisenhower was what I would call a typical Republican viewpoint. Huntsman would make an adequate president.I am somewhat leery of Romney. All the rest are total screamers.