I personally believe that Trump should win the election, i don't agree with everything he says but he would make a better President than Hillary. In fact, he won the presidential election last night!! (:
Based on your question that ask about how leader influenced there members in the congress and what factor that makes it difficult to be successfull. First leadership trait is Offering or Endorsing Financial Assistance, and also their political power may affect. The factor that makes it difficult is the limit.
From what I have learned about stingrays... They don't exactly "sleep" But they do go in a state of awareness when they "sleep" They sleep anytime they want (its not like they can tell time lol)
Answer:
The French naval.
Explanation:
The French naval blocked the British escape by sea.
because both Spain and Portugal established colonial empires during the 15th century