Should politicians be unclear as to the source of evangelical power, Rev, Haggard says, "We do represent 30 million people, and we can mobilize them if we have to." Leaving aside whether he "represents" 30 million people and whether they would all vote and lobby in lock-step (they didn't in the '80s), this is a far cry from "Not by might, nor by power, but by my Spirit, says the Lord Almighty." (Zechariah 4:6)
The first description of Satan is that he is "subtle." (Genesis 3:1) Another translation says "crafty." Satan tempts to do what seems good. Liberal churches have long believed in a doctrine of salvation-through-works, as if helping the poor was the chief responsibility of government and an end in itself, rather than a means for individuals to communicate the love of God to poor people.
The social gospel is about causes, not Christ; agendas, not Alpha and Omega; politics, not the Prince of Peace; more of this world and less of the next one. It's a subtle, but effective, means of distracting evangelicals from their paramount calling, which is about conversion, not political convictions.
By focusing on the other kingdom, one can have the most influence on this kingdom. By attending mainly to improving this world, one is doomed to futility and can do little for the other one. Look at past efforts of religious activists - left and right - and note their limited success when the focus has been on transforming culture, rather than converting hearts.
This is going to be another failed effort that will lead many astray, divert resources from more effective pursuits and leave little of eternal value. Better to "store up for yourselves treasures in heaven, where moth and rust do not destroy, and where thieves do not break in and steal" (Matthew 6:20) rather than on earth where they do.