Addressing here, not "what Catholics do" or "what Catholics think," but "what the Catholic Church teaches": there's actually a quote from either Pope Pius XII or Pope Pius XI -- I don't have it at my fingertips, but it's findable -- that says that the responsibility of voting in a democratic state is "grave matter" ... that is, to neglect to vote without a good reason, or to vote for an evil candidate when there is a good alternative, is mortal sin, capable of damning the individual to hell for eternity.
Well, too many use voting as a means of exonerating themselves or excusing themselves from any further political involvement.
Some might argue that the purpose of voting is to keep people from taking other political activity. It channels peoples political inpulses into the voting booth.
Your vote rarely matters. The outcome of elections determined by the person who draws the district lines. Let me draw the map and I will gladly permanently give up my right to vote.
Are we going to vote our ways out of this mess? Check the bulletin the first Sunday of NOV. Rarely is there a reminder of the obligation to vote.
There are exceptions. The conservative Catholics in Mass. campaigned hard for Scott Brown. But they are Mass. Democrats and it is part of their culture to know how to throw a punch.