Question:
Christians in politics—shouldn’t we have them there for a good influence?

Answer:
We are to “fight the good fight of faith” (1 Timothy 6:12), but we are not to stand against anything. Mark 16:15 is our commission to preach the gospel, and the Lord has given us nothing else to do with the world. “And He [Jesus] said unto them [His disciples], Go ye into all the world, and preach the gospel to every creature.”

The Lord told Pilate: “My kingdom is not of this world: if my kingdom were of this world, then would My servants fight, that I should not be delivered to the Jews: but now is My kingdom not from hence” (John 18:36).
The world system of which Satan is it’s “god” (2 Corinthians 4:4) for he is worshipped, and “prince” (John 16:11) for he controls the world system—was defeated at the cross. “Forasmuch then as the children are partakers of flesh and blood, He [Christ Jesus] also Himself likewise took part of the same; that through death He might destroy him that had the power of death, that is, the devil; and deliver them who through fear of death were all their lifetime subject to bondage” (Hebrews 2:14, 15).
This world, that thought it got rid of the Lord of glory by crucifying Him, is heading for judgment, for God “has appointed a day on which He will judge the world in righteousness by the Man [Jesus] whom He has ordained. He has given assurance of this to all by raising Him from the dead” (Acts 17:31).But those who trust Christ for their soul’s salvation should not fear death, for death is their servant (1 Corinthians 3:22) to take them “absent from the body and home with the Lord (Philippians 1:23).