Billionaire George Soros opened the new main campus of his Central European University in Vienna on Friday, saying it would not halt its struggle to defend academic freedom from Viktor Orban, the right wing leader he says hounded it from Hungary. CEU’s decision last year to move the bulk of its courses out of Hungary followed a long struggle between Hungarian-born Soros, who promotes liberal causes through his charities, and Orban’s anti-immigrant government. Since it was founded by Soros in 1991, CEU has been a gateway to the West for thousands of students from eastern Europe, offering U.S.-accredited graduate degree programmes in an academic climate that celebrates free thought.