Hezbollah today is Lebanon’s strongest political party. However, its military intervention in the Syrian conflict has put it at a crossroads. While the party’s domestic strength continues, largely due to the weakness of its Lebanese political opponents and to its reliance on the possession of weapons to intimidate them, Hezbollah is facing increasing challenges in Syria. The author argues that as a deal on Iran’s nuclear ambitions looms, and with it the possibility of imposed limitations on Iran’s behavior by the international community, Hezbollah – being Iran’s key client – will find its autonomy and ability to act in the domestic Lebanese sphere as well as externally reduced in the future.