BUDAPEST—Hungary’s Prime Minister Viktor Orban scored a fourth consecutive landslide win in Sunday’s election, as voters endorsed his ambition of a conservative, “illiberal” state. Surrounded by leading party members, a triumphant Orban, 58, said Sunday’s victory came against all odds. “We have scored a victory so big, that it can be seen even from the Moon,” he said. “We have defended Hungary’s sovereignty and freedom.” Preliminary results with about 98 percent of national party list votes counted showed Orban’s Fidesz party leading with 53.1 percent of votes versus 35 percent for Peter Marki-Zay’s opposition alliance. Fidesz was also winning 88 of 106 single-member constituencies. Based on preliminary results, the National Election Office said Fidesz would have 135 seats, a two-thirds majority, and the opposition alliance would have 56 seats. Opposition leader Marki-Zay, 49, conceded defeat. “I don’t want to hide my disappointment, my sadness … We knew this would be …