Challenge to Hungary's strongman Viktor Orban as 'slave law' protests rock Budapest

Viktor Orban, the populist prime minister of Hungary, is facing a rare challenge to his grip on power as protesters demand an end to controversial labour reforms and and what they call his assault on democracy.    The Hungarian capital has been rocked by nearly daily protests and opposition MPs have called for Mr Orban's overthrow since the country's parliament adopted a bill liberalising overtime rules on Wednesday.   As part of the reform, which critics have dubbed "the sla