From the NYT
Mr. Sessions said that court rulings giving gay couples the right to marry eroded American culture and values.
It is not disputable that adopting a same-sex marriage culture undermines and weakens marriage.
Senate speech, July 13, 2004
Church and State
Mr. Sessions, a Methodist of deep faith, has argued that the Establishment Clause of the Constitution has been overinterpreted and the Free Exercise Clause has been ignored. The result, he said, is the unnecessary prohibition of expressions of faith in public spaces.
The Constitution says we shall not establish a religion — Congress shall not establish a religion. It doesn’t say states couldn’t establish a religion.
Senate speech, March 10, 2016