In the antebellum era, New England-based Conscience Whigs denounced the North's pro-South Cotton Whigs as corrupt.
Every faction naming themselves Whigs always got along nicely. 
mnli hypothesis: Every faction naming themselves Whigs always got along nicely.  premise: In the antebellum era, New England-based Conscience Whigs denounced the North's pro-South Cotton Whigs as corrupt.