The indispensable Ottomans & Zionists blog explains that Prime Minister Netanyahu's outburst about "red lines" and "moral rights" was not any kind of intervention in the US political process - was not about the US political process at all.
The point of Netanyahu’s verbal barrage is not to sabotage Obama or influence the 2012 vote for president, and in fact is only directed at the U.S. because he has already emptied his chamber on Israeli leaders opposed to a strike and cannot publicly criticize the person – Ehud Barak – with whom he is actually frustrated. Barak has reportedly changed his mind about the wisdom of an Israeli strike because he has come to realize what it will mean for U.S.-Israel relations, and without Barak on board any hopes Netanyahu has of taking out Iranian nuclear facilities are completely dashed. Netanyahu cannot go after Barak, however, since he cannot afford to alienate him or to let everyone know that the two men are no longer of one mind on this issue, and so he is reduced to directing his intemperate words at the U.S. and the Obama administration as the indirect causes of his current anger. Netanyahu’s outburst is not about the presidential campaign or presidential politics, but about what he views as an Israeli national security imperative that is being stymied by an array of forces. The fact that this is campaign season in the U.S. is only incidental, since Netanyahu would have issued a similar statement at the beginning or middle of a presidential term. His prism is an Israeli one, not an American one, and his focus is on Iran rather than on U.S. politics. Believe it or not, Israel has other concerns aside from the Obama-Romney contest.