Churchill would beg the U.S. to go war just like he did in WW II. Churchill couldn’t stand that the U.S. stayed out of the war until we were attacked.
Don’t forget that there is some evidence that, as a Royal Navy bureaucrat in WW1, he may have allowed the Lusitania to travel into a submarine trap without being warned.
Churchill would have done anything to get the US into a war if it suited his purpose.
I’m not asking what he would do as Prime Minister of England. What would he counsel us to do as an adviser?