For the past six or so months, Liberal MP Anthony Housefather has been an accidental maverick in his own party. It’s an unenviable position – lonely, polarizing, controversial – and one that, by his own telling, he didn’t seek to occupy. Indeed, Mr. Housefather didn’t have much of a reputation for dissidence before, with the exception of matters of English language rights in Quebec. But the events of Oct. 7, and more specifically, his government’s shifting position on Israel, changed things. Speaking on The Line podcast back in March, he accused his own government of “changing foreign policy on the...