 Complete the following phrase:  In 1957, Saad was elected to represent Sidon in the Parliament of Lebanon, beating his opponent Nazih al-Bizri. In 1958, tensions between the mostly Muslim and Druze opposition and the mostly Christian supporters of President Camille Chamounstemming from Chamouns enmity with the United Arab Republic a union between Egypt and Syria established in February, the governments attempts at containing political opposition, and the deployment of the US Sixth Fleeterupted into countrywide 