For perhaps the first two hundred years of our American republic, Christians had the luxury of holding dual citizenship. Christians arguably could maintain a commitment to the Kingdom of God and the United States without jeopardizing their allegiance to the former by their allegiance to the later. That is no longer true.
When Christians in America turn to the question of civic involvement, they are faced with only two realistic choices. On the one hand, they can express their political interest by supporting candidates of the Democrat Party, a party that not only supports the right to abortion-on-demand, but which seeks to use government to promote that practice. Those not satisfied with that option can express their civic opinions through the Republican/Tea Party, which still has a pro-life stance but has adopted a Darwinian economic policy that damns the poor to a miserable existence for the sake of the wealthy, and a Draconian immigration policy fueled by racial hatred and division. The options posed by both parties place Christians at odds with Scripture.
In the end, religion has become merely one more tool by which politicians motivate their electoral base. And though that effort may have influenced the outcome of elections, it has done little to influence government policy. All the while, the church has grown more and more like secular society, reflecting the same rates for premarital sex, infidelity, divorce, and preoccupation with wealth.
Jesus wasn't kidding when he said, “You cannot serve two masters.”