"Our relations with Turkey are not good at this time!" he said in an early morning post.
The United States is the biggest destination for Turkish steel exports.
Trump decided in March to impose import duties of 25 percent on steel and 10 percent on aluminum imports from several countries, including Turkey.
For a start, investors are anxious that Turkish companies that borrowed heavily to profit from a construction boom may struggle to repay loans in dollars and euros, as the weakened lira means there is now more to pay back.
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But just past year , Mattis voiced skepticism on the need to create a separate Space Force. Air Force Space Command, which now oversees the nation's military operations in space.
Without naming countries, Erdogan said supporters of a failed military coup two years ago, which Ankara says was organised by a US-based Muslim cleric, were attacking Turkey in new ways since his re-election two months ago.
"The surge in Turkish inflation, bond yields and the even more dramatic plunge in Turkey's exchange rate in 2018 suggest that the country could now be in danger of heading for a bust", Berenberg economist Carsten Hesse said.
The lira has been under sustained pressure on foreign exchanges, dropping by nearly 50% against the dollar in the past 12 months.
On Aug. 1, the US Treasury announced it was freezing the assets of Turkey's justice and interior ministers over Brunson's continued detention. Trump and Vice President Mike Pence threatened on July 26 to impose sanctions on Turkey if the pastor is not set free and allowed to return to the United States.
U.S. investors shifted focus from strong corporate earnings to the rout in Europe, sending the major stock-market indexes lower. The lack of central-bank action to support the currency is also spooking investors and Erdogan's previous comment that interest rates are the "mother and father of all evil" hasn't helped. "But if the United States can't handle relations with Turkey ... then a further deepening of relations with Moscow is an option".
Far worse than that, though, is this has also sent Turkey's currency on a downward spiral that threatens to destroy its entire economy.
Turkish President Recep Tayyip Erdoğan struck a defiant note in a series of Twitter messages shortly before Trump's announcement.
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The only place in Europe where it is still legal is Belarus, which has a sizeable Catholic minority of about 7% of the population. Robert Vischer, dean of the University of St.
The lira's value fell about 13 percent against the dollar on Friday.
In Washington, where Turkey seems to have lost its friends and faces a passionate anti-Erdogan lobby of which the Gulenists are an important part, there may be wishful thinking that an economic collapse could sweep him from power.
The Lira has plunged 66% since the start of the year, pushing up the cost of goods for Turkish people and shaking global investors' confidence in the country.
So, to hike tariffs on Turkey, Trump needed a reason why maintaining America's domestic metal industry required imposing even steeper tariffs on Turkish exports than were already in place.
Turkey, home to the Incirlik air base which is used by USA forces in the Middle East, has been a North Atlantic Treaty Organisation member since the 1950s and a close ally of the United States.
A year ago, there were 3.5 liras to the U.S. dollar. Overnight it had retreated to its lowest since November 2016 on threats of new US sanctions, weakening beyond the psychologically important 65-per-dollar threshold.
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He said, "Hamas is moving away from an arrangement to calm things down and is moving near to a war in which it would be hit hard". Gaza's residents have been protesting every week since 30 March at Israel's border fence, which have been violently suppressed.