In the wake of Hamas’ Oct. 7 attack on Israel, which killed more than 1,400 people, Democratic leaders — including President Joe Biden — have largely given their full-throated support for the country’s right to retaliate. That includes Sen. John Fetterman , D-Pa., one of the Senate’s leading progressives. “I unequivocally support any necessary military, intelligence, and humanitarian aid to Israel,” he said in a statement two days after the attack. “The United States has a moral obligation to be in lockstep with our ally as they confront this threat. I also fully support Israel neutralizing the terrorists responsible for...