Turkish President Recep Tayyip Erdogan vowed to take measures in response to the US move to double tariffs on metal imports from Turkey.
He called the collapse of the lira, the country's national currency, "a plot against Ankara," stressing that the Turkish people won't give in.
Erdogan also noted that US President Donald Trump’s decision to double tariffs on metal imports is against the rules of the World Trade Organization (WTO).
For the third day in a row, Turkey's president has been urging Turks to sell dollars and euros to support the national currency.
On Friday, US President Donald Trump authorized a doubling of metal tariffs already in place against imports from Turkey, with duties on aluminium and steel amounting to 20 and 50 percent respectively.
Washington believes that he was jailed unlawfully. Ankara has scolded the US sanctions and promised to freeze US Justice and Interior Secretaries' assets in Turkey.
Brunson was detained in 2016 on suspicion of links to the movement founded by Islamic cleric Fethullah Gulen, who Ankara holds responsible for the failed coup attempt that same year.