After Donald Trump sat down with Ukraine's President Zelenskyy in Rome this week, Sky's US correspondent Mark Stone speaks to Ambassador Gordon Sondland, who was Trump's ambassador to the EU from 2018-2020, about Trump's changing approach to Russian aggression.  
 
And, how getting European leaders on first-name terms helped build bridges that could be helping Volodymyr Zelenskyy today.  
 
If you've got a question you'd like the Trump100 team to answer, you can email it to [email protected].  
  
Don't forget, you can also watch all episodes on our YouTube channel.