By Maayan Lubell JERUSALEM, July 29 (Reuters) - Israelis are due to hold a national election on October 27. It will be the first since the deadly October 7, 2023 Hamas attack that shook the country and plunged the Middle East into turmoil as Israel went to war in Gaza, Lebanon and Iran. Although polls predict a clear defeat for Prime Minister Benjamin Netanyahu, elections in Israel can be complex with a fragmented political system in which anyone can emerge as kingmaker. WHAT DO THE POLLS SHOW?