By Krisztina Than BUDAPEST (Reuters) -Tens of thousands rallied in Budapest against Prime Minister Viktor Orban on Saturday, waving the national flag as the leader of the surging opposition Tisza party pledged to make Hungary part of a strong Europe and end Orban's 15-year rule.

Hungary’s Prime Minister Viktor Orbán is vowing to rid his country of foreign-funded groups, calling them a “shadow army” serving the European Union and a “liberal American empire.”

The right-wing populist prime minister has stepped up his attacks on critics, largely journalists and civil society organizations, since US President Donald Trump entered office.

Hungary's Prime Minister Viktor Orban pledged on Saturday to crack down on politicians and journalists who receive foreign funding and again ruled out EU membership for Ukraine, stepping up his campaign for elections due in a year.

Hungary’s populist prime minister on Saturday vowed to rid his country of those he claims work for the interests of foreign powers, saying his right-wing government will eliminate a global “shadow army” serving the European Union and a “liberal American empire.