Most Catholics in my area are democratic, but push for right wing amendments like anti-abortion. Then again there a many factors to that. My area of Tampa has a high Peurto Rican population, and Peurto Ricans tend to lean to the left I've seen. And because they are hispanic, and many hispanics are Catholic.
There are also a lot of Methodists that are liberal.
You have liberal Baptists
Liberal Presbyterians
Liberal Episcopalians
Liberal Jews (In the Bible, they were called Sadducees. They were Sad u see.)
Liberal Non-denominational Christians
Liberal Unitarians
Liberal 7th Day Adventists
Liberal Jehovah Witnesses
And the list goes on.
Liberals come in many shapes, sizes, and flavors.
*Addition: I would also like to add that Liberalism is no longer thinking on what is right or wrong with a sound intellectual approach as to the normal approach to politics, but a cultural emotional phenomenon. It has become "If the other side thinks this is bad, it must be right. If my beloved leader thinks this is right, it must be right."