WASHINGTON (Reuters) -Three U.S. service members were killed and as many as 34 wounded, United States officials said on Sunday, after a drone attack in Jordan that they linked to Iranian-backed militants. The attack is a major escalation of the tensions in the Middle East sparked by Hamas’ attack in Israel on Oct. 7 and Israel’s retaliatory strikes that have devastated Gaza. Here are reactions from key policy makers in the United States and several countries: DEMOCRATIC U.S. PRESIDENT JOE BIDEN “The three American service members we lost were patriots in the highest sense. And their ultimate s…