House Speaker Mike Johnson assured a pro-Israel crowd that if Democratic lawmakers get out of hand when Israeli Prime Minister Benjamin Netanyahu addresses Congress on Wednesday, he will arrest them. Mr. Johnson’s threat to lock up Democrats came during remarks at a Republican Jewish Coalition event at the Republican National Convention on Thursday, less than a week before Mr. Netanyahu speaks before both chambers of Congress. “I want you to know that there’s a number of Democrats in the House who have said they’re going to boycott the event … and then some others are going to protest,” Mr. Johnson...