As a part of a March 2016 agreement, migrants arriving to Greece are sent to Turkey if they have not already applied for refugee status in the EU or if their applications have been rejected. For each Syrian returned to Turkey, the EU agrees to accept one Syrian with a valid refugee request. In return, the EU promised Turkey aid, visa-free travel for Turkish nationals, and to speed up Turkey's EU membership discussions. However, Members of European Parliament (MEPs) recently voted to freeze Turkey's EU-membership talks because of Turkey's failed military coup in July. The EU has also delayed visa-free travel for Turkish nationals because Turkey has not changed its anti-terror laws.
"Listen to me: these border gates will be opened if you go any further," Erdogan warned the EU on Friday.
At the moment, Turkey has accepted over three million migrants who are mostly from Syria. Last year, over one million people sought refuge in Europe by way of Turkey.
In light of these recent events, the relationship between the EU and Turkey is weakening and the deal to control migration into Europe appears to be degrading.
to threaten - to say that something bad will happen if something is not done
surge - a sudden increase
halting - stopping (gerund - noun)
migrant - someone moving from one (country) place to another
refugee - someone who asks to enter another country because their home country is treating them badly
refugee request - an application for refugee status
aid - (financial - money) help
sought - past tense of "seek" - to look for __
to freeze - to stop
in light of - concerning; due to; because of
to degrade - to slowly fall apart; to slowly disassemble