While there has been a decades-long decline in the Christian share of U.S. adults, 88% of the voting members in the new 118th Congress identify as Christian. That is only a few points lower than their share in the late 1970s.
Some political observers predict that Obama will be using his veto pen a lot more in his last two years in office than he did in the first six. Recent history indicates that presidents do veto more bills when both houses of Congress are controlled by the opposing party.