The long campaign for the US presidency is well underway. The spate of campaign launches in recent weeks only formalizes what has been unfolding for months, namely, the so-called "invisible primary," in which candidates jockey behind the scenes to raise money, hire campaign staff, and win over key activists. Voters have eight months to wait before even the first of the caucuses and primaries. Still, among the donors and activists, much is taking place, some of it of interest to Israel.