Hungary's government wants to change the constitution so it can temporarily strip dual nationals of their citizenship in a move aimed at financiers supporting NGOs and independent media from abroad.
Prime Minister Viktor Orban pledged to oust "liberal networks" from the country by Easter with a crackdown on NGOs that receive financial support from the United States.
"Foreign powers and speculators have intervened in Hungarian internal affairs... through bogus NGOs and bought politicians and so-called independent media," Mate Kocsis, the head of Orban's ruling Fidesz party in parliament, wrote on Facebook.
Some in the media saw the change as targeting the billionaire US-based philanthropist George Soros, a prominent supporter of liberal causes and civil society in his homeland. The 94-year-old dual national is the bete noire of Hungary's nationalist, Moscow-friendly leader.
Under the amendment, "the citizenship of a Hungarian citizen who is also a citizen of another state... may be suspended for a limited period".
Those who "pose a threat to public order, public security or national security" would be targeted, Fidesz said in a Facebook post late Tuesday.
"Anyone whose citizenship is suspended may be expelled from the territory of Hungary," it added.
The provision -- which exempts citizens of other EU states -- would come into effect on April 15 if it is voted through parliament.
The constitutional amendment also echoes moves by US President Donald Trump -- who Orban described as a "dear friend" -- on gender.
It would enshrine in law that Hungarians can only be male or female, and continue his government's squeeze on LGBTQ rights.
The proposal would declare children's rights for their proper physical, mental and moral development "take precedence over all other fundamental rights, except the right to life".
This change also aims to stop the annual Pride march from taking place in the "same public form" as before, according to Orban's chief of staff Gergely Gulyas.
Fidesz claims the goal of legal changes is to "preserve Hungary's fundamental values" as "the norms once taken for granted" are increasingly challenged in the Western world.
It is not yet clear when parliament will vote on the draft amendment.
Since his return to power in 2010, critics say Orban has clamped down on NGOs, curbed civil rights and has made other changes to tighten his grip on power.