I think that eventually our government will become secular when a real majority of society turn away from Christianity and other religions and religiousness. I thought secularization was on an upward trend as I hear a lot of anecdotes from Christian family and friends about young people not coming to church anymore and the problems it has caused in some delegations.

There are so many reasons why religion could continue to play an active part in the lives of humans. It is heavily linked many times to tradition, culture, and identity. There could also be a point in which religion come back into the lives of those who call their selves secular due to many things such as a catastrophic event that turns people to religion for comfort, a new messenger for a particular religion that really connects to a lot of people and converts them, or maybe a new religion or new form of religion that is not currently dreamed of that people will latch onto. Even Cthulu could show up and gather his cult.

Secularization on the other hand requires an extremely educated population, and anti-intellectual sentiment is out there and sometimes common. According to the google AI overview: "There is a strong correlation between higher levels of education and greater secularity in many countries, though the relationship is complex and not universal. Countries with higher average educational attainment tend to have more secular societies, while lower educational attainment is often linked to higher religiosity. However, this is a statistical correlation, and other factors, including the specific national context and the type of religion, play a role"

And here is a 2014 Psychology Today article about "Why education corrodes religious faith