Mikheil Kavelashvili, a hardline critic of the West, was sworn in as president of Georgia on Sunday amid a political crisis after the government froze European Union application talks in a move that sparked major protests.

Outgoing President Salome Zourabichvili, a pro-EU opponent of the ruling party, said in a defiant speech to supporters outside the presidential palace that she was leaving the residence, but that Kavelashvili had no legitimacy as president, which is a mostly ceremonial position.

She said: "I will come out of here and be with you".

"I am taking legitimacy with me, I am taking the flag with me, I am taking your trust with me," she added, before walking out of the palace to mingle with her supporters.

Zourabichvili says that Kavelashvili was not duly picked, as the lawmakers who chose him were elected in an October parliamentary election that she says was marked by fraud. Georgia's opposition parties support her.

The Georgian Dream ruling party and the country's election commission say that the October election was free and fair. The ruling party says Kavelashvili is the duly elected president.

The presidential standoff is seen as a watershed moment in Georgia, a mountainous country of 3.7 million that had until recently been regarded as among the most democratic and pro-Western of the former Soviet states.

Kavelashvili is a loyalist of Bidzina Ivanishvili, a reclusive billionaire ex-prime minister who is widely seen as Georgia’s de facto leader.

On Friday, the U.S. imposed sanctions on Ivanishvili, saying he was spearheading Georgia’s current anti-Western and pro-Russian turn.