Israel did just fine in the Six-Day's War and the Yom Kippur War, so they could've easily survived on their own. They are considered to be one of the world's best militaries. And I don't think America did most of the work in deflecting the Iranian missiles, it was mostly Israel. I doubt that America would have troops working in that area to keep missiles out. Under Biden though, many new wars started. He un-secured the borders, leading to thousands of illegal foreign 'invaders' entering the nation. He worsened relations with Russia and China, bringing the world closer to WWIII. And under him, inflation has gone way up and prices are going very high.