Vermont Sen. Bernie Sanders faces the biggest test yet of his insurgent presidential campaign when he faces off with Democratic front-runner Hillary Rodham Clinton in party's second primary debate. His goal on Saturday night is clear: Reset a contest that increasingly looks like little more than a march to the nomination for Clinton. That effort will be complicated by fresh terrorist strikes that have captured the world's attention. The debate is likely to wade heavily into international affairs, in the wake of overnight attacks in Paris that killed more than 120 people. All the candidates quickly denounced the attacks in statements on Friday night. Party officials said the forum will continue as planned.