Ann Coulter's 2006 book Godless: The Church of Liberalism makes the connection between liberalism and atheism, arguing that to its adherents, liberalism holds every single characteristic of a religion: an atheistic one.
She maintains that,
- Liberalism has its own cosmology, its own explanation for why we are here, its own gods, and its own clergy. The basic tenet of liberalism is that nature is god and men are monkeys. (Except not as pure-hearted as actual monkeys, who don't pollute, make nukes or believe in God.)
- Liberals deny that liberalism is a religion – otherwise, they'd lose their government funding. To their thinking, the separation of church and state means separation of your traditional churches from the state, but total unity between their church and the state.
- The ACLU promotes evolutionism. "The ACLU sued a school district in Cobb County Georgia, merely for putting stickers in biology textbooks that urged students to study evolution 'with an open mind, studied carefully, and critically considered.'  According to the ACLU, an open mind violates the 'separation of church and state,' which appears in the Constitution just after the abortion and sodomy clauses." 
The popular novelist Michael Crichton makes much the same point as Coulter:
- Ann Coulter, Godless: The Church of Liberalism (New York: Crown Publishing Group, 2006) ISBN 1-4000-5420-6
Liberals love to boast that they are not 'religious,' which is what one would expect to hear from the state-sanctioned religion. Of course liberalism is a religion. It has its own cosmology, its own miracles, its own beliefs in the supernatural, its own churches, its own high priests, its own saints, its own total worldview, and its own explanation of the existence of the universe. In other words, liberalism contains all the attributes of what is generally known as 'religion.'
- Ariel Hart, "Stickers Put in Evolution Text Are the Subject of a Federal Trial," New York Times, November 9, 2004
- Ann Coulter, Godless: The Church of Liberalism (New York: Crown Publishing Group, 2006)