WASHINGTON (AP) — There was no mistaking the odd man out.

Wednesday's funeral service for former President George H.W. Bush served as a rare reunion of the remaining members of the presidents club, but the front-row banter among Barack Obama, Bill Clinton and Jimmy Carter and their spouses came to an uneasy end when President Donald Trump and wife Melania arrived.

The encounter was a real-time illustration of the uneasy ties between the current occupant of the White House and his predecessors, suggesting Trump as a member-in-name-only of the Oval Office fraternity. While the funeral ceremony i...