Hungary's nationalist government introduced legislation that would empower the interior minister to ban non-governmental organizations (NGOs) that support migration and pose a "national security risk".
The bill, submitted to parliament late on Tuesday, is a key part of Prime Minister Viktor Orban's anti-immigration campaign targeting U.S. financier George Soros whose philanthropy aims to bolster liberal and open-border values in eastern Europe.
The government says the bill, which would also impose a 25 percent tax on foreign donations to NGOs that back migration in Hungary, is meant to deter illegal immigration Orban says is eroding European stability and has been stoked in part by Soros.
Hungary and Poland are both under nationalist governments that have clashed with the European Union leadership in Brussels over their perceived authoritarian drift deviating from EU standards on democracy and rule of law.
But Orban's message, championing conservative Christian beliefs and rejecting multiculturalism, has gone down well with Hungarian voters and his Fidesz party is expected to secure a third straight term in a general election due on April 8.