Well, yes & no.
I mean, you could say that no early Christian who was a true Christian would be sleeping with their mom-in-law; but the church @ Corinth had that...and the apostle Paul addressed it.
(You have even less church discipline these days...so there's ALL kinds of people on the rolls of church membership lists...and remember, Jesus said that the tares would be among the wheat...)
Well, sounds like you are a very liberal Republican or a Democrat.
When we are speaking about religion, we are talking strictly about adherence to the Bible, not churches beliefs or sayings.
No ONE who believes in the Bible could ever vote for a Democratic Candidate these days!! That includes all Evangelicals to me unless you narrow the definition to something that I no longer recognize.
Church discipline has absolutely nothing to do with this! This is all about individual beliefs and whether they are actually a Christian or not! If they are a Christian (or Evangelical) then they could NOT vote for Obama!!