Detailed Instructions: In this task, you will be presented with a passage and have to answer a question based on your understanding of the events inferred from the passage. Try to find the best answer that is most likely to fill in "_". Note that the URLs in the text have been replaced with [Link].
Problem:Washington (CNN) When King Abdullah II of Jordan was presented with a wave of refugees from Syria, he welcomed more than a million people into his country. When President Donald Trump was presented the same, he closed the door. The two world leaders who met Wednesday are united in the fight against ISIS -- a fact Trump heralded during a news conference in the White House Rose Garden -- but the duo are each other's antithesis when it comes to responding to the now ever-present issue of Syrian refugees. The meeting comes as the focus on Syria's ongoing civil war is at its brightest: The White House, along with activist groups and other foreign leaders, blamed forces tied to Syrian President Bashar al-Assad on Tuesday for a chemical attack in a rebel-controlled area of Syria.Trump has sought to slow refugees coming to the USAbdullah has welcomed many refugees to Jordan 
 Question:Trump said Wednesday that the chemical attack "crossed a lot of lines" for him and changed his "attitude towards Syria and _ has changed very much."
Solution:
Assad