The population of the united states also as of 2008 was about 304,375,000. Which tells;
That's approximately 46:1 Christians to Secularists. Now for the geography part.
The U.S. is 3,717,813 square miles of which 3,536,294 square miles are land. You can see where this is going.
63.7 Christians per square mile on average.
1.4 Atheists/Agnostics per square mile on average.
These numbers are rounded. By state as of 2010(and this won't work out perfectly due to the two-year gap in population data);
California-37,253,956 (27,567,927 Christians, 596,063 Secularists)
That is more secularists than the entire population of Wyoming. Forty-nine times the number of Christians to the population of Wyoming.
Let us now assume that somehow religion is being oppressed despite the majority. I'm sorry... I just can't see how they could even make this claim.