It is true that I am an evangelical Christian. However, that's not the reason I lean to the political right. At least, it's not the primary reason. I'm not driven by topics like abortion and gay marriage, despite the efforts of many on the right and the left to elevate those two issues to the top of the priority list.
No, my reason for moving from a liberal in my younger years (my first presidential vote went to Dukakis in 1988; I also voted for Ann Richards for TX governor in 1990) to my current conservative status owes more to the fact that I took a few history and economics classes in college.
The more I understand economics, the more I understand that less government is better, on two levels: a practical level and a deeper level. By practical, I mean that one can easily demonstrate with numbers how an economy will benefit when the government stays out of it. You give a dollar to the government, and it stays there. You give a dollar to a business, and that dollar gets spent several times, and it gets taxed each time. Businesses gain money, families get fed, and the government still gets money from the fact that the dollar got spent and passed through so many hands, being taxed each time. (By the way, this is why I'm against the lottery; my religious ideas are not even involved). When getting my 2nd degree, I took a class with a boring name (something like "Economics of Public Policy") and explained it very well. The professor, Roger Meiners, is extremely knowledgeable in this area. He's worth googling.
But beyond the practical level is the question of how we are affected at the core. When we think it's OK to force the rich to support the poor, when we think it's OK to expect a handout from the government, I think it's bad for the soul. This past Fall, while the press piled on the guy known as Joe the Plumber, the real story was not him, but what Obama said to him. He said we need to "spread the wealth around." By which he meant having the government force you to spread your wealth to those who have less than you.
While we all should give to those less fortunate, such giving should be voluntary. Forced giving is wrong even when it's phrased in seemingly harmless ways, such as "spread the wealth around", or when we glorify such practices in stories like "Robin Hood", but the result is damaging.
Sadly, I think our nation has devolved into a mindset that forced giving and the expectations of government handouts is the norm now. That doesn't mean it's any less harmful to our soul, but it does mean it's probably irreversible.