Tocqueville wrote (Lawrence/Mayer version, p. 297):
Billy Graham, the most famous living evangelist, reflects in Christianity Today:
When a religion seeks to found its sway only on the longing for immortality equally tormenting every human heart, it can aspire to universality; though when it comes to uniting itself with a government, it must adopt maxims which apply only to certain nations. Therefore, by allying itself with any political power, religion increases its strength over some but forfeits the hope of reigning over all.
I also would have steered clear of politics. I'm grateful for the opportunities God gave me to minister to people in high places; people in power have spiritual and personal needs like everyone else, and often they have no one to talk to. But looking back I know I sometimes crossed the line, and I wouldn't do that now.