Romanism was a derogatory word for Roman Catholicism when anti-Catholicism was more common in the United Kingdom. and the United States

Diana Peschier has written:

'Nineteenth-century anti-Catholic discourses' -- subject(s): Anti-Catholicism, Anti-Catholicism in literature, Catholics, Catholics in literature, Characters, Christianity and literature, History, Religion

B. An upsurge of anti-Catholicism.

Susan M. Griffin has written:

'The process of vision'

'Anti-Catholicism and nineteenth-century fiction' -- subject(s): American fiction, Anti-Catholicism, Anti-Catholicism in literature, Catholic Church, Catholics in literature, History, History and criticism, In literature, Protestant authors, Protestantism and literature, Religion in literature

The radical Republicans did believe that Catholicism was a threat to the democracy of the US because of the anti-democracy teachings then.