If you care about the faith of fellow Christians, remaining Christian, and true to the beliefs and values you hold and cherish, then you have to fight. Because no one can be honest with themselves, to say that the secular environment we live in today, is good for Christian faith. So on that very basis alone, you have not only a moral obligation, in alignment with the tenants and values of your faith, to be involved in politics, but a religious obligation as well, to create an environment where members of your faith aren't being drawn away from God. Allowing such an environment to persist is to do the enemy's work for them. Inaction is action. It's a vote, and you're casting your vote on behalf of those who do fight, the majority of whom don't share your values, or the kind of America you want to live in. Many Christians just don't know how to fight, and quite frankly, those Christians who do fight are largely ineffective. So you can't blame them for throwing their hands up and walking away. Because the task is just too enormous. But there was a great rabbinic saying, that goes "It's not up to you to finish the task, nor are you free to desist from trying." And I think that's the mindset we just have to have. Ask not what God can do for you, and ask instead what God wants you to do. That's at least how I live my life, and God would have an incredible army fighting on his behalf if others asked the same: Win or lose, what does God want me to do.