While wingnuts Lou Dobbs and Alan Keyes are against the Republican drive to repeal the 14th Amendment, the official Republican website, GOP.com, lists the 14th Amendment as a great Republican success story.
One side-note here.
I generally don't trust anyone who plays the "our party is great, and your party sucks" game using historical examples beyond, say, FDR's presidency -- and even that might be a little too deep into the past. Parties are like office buildings. Ideology, party members and platforms, like lease-holding businesses, come and go. So to suggest that there's any substantive relationship between the Republicans of 1866 and the Republicans of 2010 is extraordinarily stupid. The modern Republican plan to repeal the 14th Amendment, for example.