The 1903 revision of the Westminster Confession eventually led a large number of congregations from the Arminian–leaning Cumberland Presbyterian Church to reunite with the PCUSA in 1906. While overwhelmingly approved, the reunion caused controversy within the PCUSA due to concerns over doctrinal compatibility and racial segregation in the Cumberland Presbyterian Church. Warfield was a strong critic of the merger on doctrinal grounds. Northern Presbyterians, such as Francis James Grimké and Herrick Johnson, objected to the creation of racially segregated presbyteries in the South, a concession demanded by the Cumberland Presbyterians as the price for reunion. Despite these objections, the merger was overwhelmingly approved.