Hungarian President Tamás Sulyok has agreed to resign and signed an amendment to the country’s constitution that will end his presidency at midnight Sunday.

Prime Minister Péter Magyar’s Tisza party had pushed the law change in parliament to oust Sulyok, widely considered loyal to former Prime Minister Viktor Orbán, who lost power in April after 16 years.

Sulyok had five days to sign the amendment or risk a prolonged constitutional crisis and impeachment proceedings.

He confirmed he would accept the law change when the deadline expired on Saturday afternoon, but in a statement accused the Magyar government of violating the rule of law.

He said the amendment marks a “breaking point in Hungarian constitutional democracy” and said that “the fundamental values ​​of a free society… have been trampled for the sake of political power.”

This is the latest and most dramatic move by the Tisza government, which viewed Sulyok as a puppet of the previous government and had pressured him to resign.

He has made major constitutional changes since winning a landslide victory in April.

Orbán described the amendment as an act of tyranny and called for protests.

Since the April election, Orbán’s party has been in free fall, reeling from the shocking defeat. Orbán himself has barely been seen in public and refused to take his seat in parliament.