Catechism number 2237

Political authorities are obliged to respect the fundamental rights of the human person. They will dispense justice humanely by respecting the rights of everyone, especially of families and the disadvantaged.
The political rights attached to citizenship can and should be granted according to the requirements of the common good. They cannot be suspended by public authorities without legitimate and proportionate reasons. Political rights are meant to be exercised for the common good of the nation and the human community.

The duties of citizens