Turkey's offensive against the Kurdish forces in northeastern Syria continues. The United States has already withdrawn its troops from the area, and then Turkey's offensive could begin.
Now a letter from Donald Trump to Erdogan has come out, urging the US president to re-evaluate his decision.
"You don't want to be responsible for the slaughter of thousands of people," Trump writes.
The letter has received a great deal of attention around the world, with many responding to the language used.Here is Trump's letter in its entirety: