BEIRUT — Congresswoman Illena Ros-Lehtinen will have her hands full as she makes the political and social rounds at this month’s Republican National Convention. Illena is the only female committee chair in the House of Representatives and arguably Israel’s most ardent agent. She is a constant thorn in the Obama administration’s side, regularly castigating the president for playing “political games with U.S. foreign policy” and being “soft on Iran” and undermining the legitimacy of Israel. Ros-Lehtinen is a congressional cheer leader also for her Jewish voters in Florida—a key battleground in the rapidly approaching US presidential election. Most recently, Ros-Lehtinen...