Is God's Existence Necessary?

"I'm on board all the way up until you get to, i think, a necessary being. And so for me, my job is to figure out what, what assumptions i'm making that make that difficult" "It doesn't seem actually a problem, from where i'm sitting, for christian theism to take what i now know to be the swinburne sort of view," he says. 'But it's hard for me to get on that the train of god being a necessary being'