Don’t forget Bryan being in favor of silver hurt him greatly in the cities, where immigrants lived.
More than that, if not to nearly the same extent as in the Old Confederacy, Republicans in the North and West made voter registration much more difficult than before 1890.
This meant that only a small proportion of the urban poor was voting in most elections between 1900 and 1930. Failure to redistrict out of fear that a radical left party would take over urban areas meant that there was less value in voting at least for the legislature.
