Greece’s government has moved to block from Parliament an extreme-right party seen as a successor to the neo-Nazi group Golden Dawn, which shot to prominence a decade ago but was effectively banned after being declared a criminal organization. On Wednesday, a government-sponsored bill in Parliament that bars from the legislature parties whose leaders have been convicted of serious crimes and are deemed a potential threat to democracy passed with the votes of the ruling conservatives and the opposition Socialist party, who control a total of 178 seats out of the 300 in the house. The main leftist Syriza party abstained,...