What I consider liberal is the Catholic vote being an extremely dependable vote for the left in election, after election for generations. There was nothing unique about the Catholics electing Obama.
Still, I would share your dismay for even one Catholic voting liberal, but God's Church cannot be judged by the failure of those who claim to be its members. Should Moses be rejected for unfaithfulness of the Israelites?
Patently not true.
"But when we hear that 54 percent of American Catholics voted for President Obama last November, and that this somehow shows a sea change in their social thinking, we can reasonably ask: How many of them practice their faith on a regular basis? And when we do that, we learn that most practicing Catholics actually voted for Senator McCain." - Archbishop Charles Chaput.