Turkish President Recep Tayyip Erdogan on Sunday said the crash of the Turkish lira, sparked by a bitter dispute with the United States, was a "political plot" against Turkey and warned Ankara would now seek new markets and partners. 

The dispute between the two NATO allies – which reached new intensity over the detention of an American pastor in Turkey – has hammered the lira and also raised questions over the future partnership between Washington and Ankara. 

The already embattled Turkish lira tumbled some 16 percent to new record lows against the dollar on Friday as US President Donald Trump said he had doubled steel and aluminium tariffs on Turkey.

But Erdogan indicated he was in no mood to offer concessions to the United States, or financial markets. "The aim of the operation is to make Turkey surrender in all areas, from finance to politics," Erdogan told ruling party members in the Black Sea city of Trabzon. 

"We are once again facing a political, underhand plot. With God's permission we will overcome this," he added. 

Erdogan appeared unworried by the punitive measures imposed by the US, saying Turkey could turn to other partners and again terming the crisis an "economic war." 

"We will give our answer, by shifting to new markets, new partnerships and new alliances, to the one who waged an economic war against the entire world and also included our country," Erdogan said. 

"Some close the doors and some others open new ones," added Erdogan, who has built closer ties over the last years with countries from Latin America, Africa and Asia. 

Erdogan appeared to indicate that the entire alliance between Turkey – which joined NATO in 1952 with strong American backing – and Washington was at stake. "We can only say 'goodbye' to anyone who sacrifices its strategic partnership and a half century alliance with a country of 81 million for the sake of relations with terror groups," he said. "You dare to sacrifice 81-million Turkey for a priest who is linked to terror groups?" 

American pastor Andrew Brunson has been held since October 2016 on charges of terror and espionage, and if convicted, could face a jail term of 35 years. Trump has described his detention as a "total disgrace" and urged Erdogan to free him immediately. 

A delegation led by Turkish Deputy Foreign Minister Sedat Onal failed to secure a deal last Wednesday in talks in Washington on a number of issues including Brunson.  

Washington earlier this month already imposed sanctions on senior Turkish officials over the Brunson case, angering Erdogan and prompting retaliatory measures by Ankara. 

And the Brunson case is just one of many bones of contention between Turkey and the United States, ranging from Syria to Ankara's increasingly cozy relationship with Moscow.