MUNICH—Ask a European official who attended this weekend’s Munich Security Conference about the state of the trans-Atlantic relationship, and you’re likely to hear metaphors about dealing with a troubled, possibly abusive, spouse. Secretary of State Marco Rubio delivered a less pugnacious message when compared with last year’s Munich conference. Back then, Vice President JD Vance launched a blistering attack on the governments of Europe’s largest nations and embraced their far-right political opponents. Rubio, by contrast, got a standing ovation after highlighting the importance of trans-Atlantic ties and common history and culture. Yet, though the Europeans and the Trump administration are…