Q.
Governor Smith’s religion during the campaign made him a target of prejudice and insinuation, as some charged that his loyalty to the Pope superseded his loyalty to the United States.
"during the campaign" seems to modify the "religion".
while "during the campaign" is time frame of what happened "smith's religion made governor the target of ...
at first, I could not identify whether him or his governor was the target of prejudice and insinuation
I don't think the usage of pronoun "him" is wrong by itself, it can refer to smith, but from the meaning point of view governor was the target of prejudice
A. Governor Smith’s
religion during the campaign made him a target of prejudice and insinuation, as
B. Governor Smith’s
religion during the campaign made him a target of prejudice and insinuation
andC. During the campaign, Governor Smith’s religion made the governor a target of prejudice and insinuation, asD. Religion of Governor Smith made him a target of prejudice and insinuation during the campaign
andE. Governor Smith
was made a target of prejudice and insinuation by his religion during the campaign, as
passive voice! changes the intended meaning