As a Christian, I have to say that I have always found politics - of _any_ stripe - from the pulpit to be uncomfortable.  Truth be told, I don't believe it is good for the church.  Certainly politics is discussed in the church, but the service and the sermon should be about faith, not politics.  We're all people - those who agree with us and those who disagree with us both.  Everyone of us thinks we're right - if we thought we're wrong, we'd hold a different opinion.  It is therefor arrogant to insist that Christians must support a particular political viewpoint.