So in my own humble attempt to insert my own two cents, I offer the following thoughts in order to set the stage for better, more constructive dialogue:
First of all, President Obama's views, policies, and so on do not change anything about Christianity. Christianity has survived and thrived under governments of deep oppression and persecution for over 2000 years. To my brothers and sisters who are tempted to cast worried glances and bemoan the doom of the church as we know it, all I can say is: the church as we know it may be modified, but the church itself is built on the ROCK and the gates of hades will not prevail against it.
Second, with all due respect, President Obama's opinion is not the first or the final word on the subject of Christianity in the U.S. As my old aunt used to say, "Just 'cuz he said it, don't make it so!" The sentiment that "America is not a Christian nation" is an old and oft-repeated one that has been proclaimed long before the President was even born. My liberal friends have expressed their extreme pleasure that someone has come forward to clear up the question, as if my President's words magically settled a long standing controversy. They haven't…all they did was once again stir up the proverbial pot..
Third, those of us who proclaim faith in Christ should try to define our terms. When I am asked if America is a Christian nation, I usually say, "yes and no." Yes, because we can build a pretty good case for the Judeo-Christian consensus in the founding of our country. Yes, because we can document a stream of statements and quotes that demonstrate that. But no, because our country is not a branch of Christianity, it does not send out national missionaries, and, quite frankly, we allow a lot of things that are decidedly un-Christian. So perhaps as we start this debate, we need to take a moment and discuss exactly what we mean by "Christian nation", so at least we are all on the same page.
Fourth, many posters have used the President's words to launch into a diatribe against the Bible. Aside from the fact that most of the attacks are the same tired old stanzas that Christian apologists have addressed years ago, it still doesn't change the original question of whether America is a Christian nation. Your agreement or disagreement with the source material does not change the founding of the country on this source material.