Original: Bishara has been a Knesset member ever since the fourteenth Knesset (first seating June 17, 1996) and "was a key founder of the political party that he represents in the Knesset, the National Democratic Assembly (NDA-Balad)."
Simplified: Bishara was a Knesset member from the fourteenth Knesset (first seating June 17 1996) until April 22, 2007. He was the most important member of his political party, the National Democratic Assembly (NDA-Balad) in the Knesset during this time.