TASK DEFINITION: Given a document, generate a short title of the document. The title should convey the main idea/event/topic about which the document is being written. Note that URLs in the text have been replaced with [Link].
PROBLEM: The United States is bracing for a heated political battle after venerable US Supreme Court Justice John Paul Stevens announced his retirement from the bench.
 George Washington University law school professor Jonathan Turley described Stevens's retirement as "an understandably sad moment for liberals."
 Stevens nearly beat the record of his long-serving predecessor  William Douglas  who served for 36 years.
 Born in 1920 in Chicago  Stevens first threw himself into the study of literature in the hope of becoming a professor like his mother.
 But he turned to law after joining the US Navy following the attacks on Pearl Harbor  serving as an intelligence officer from 1942 to 1945.

SOLUTION: Political battle looms after Justice Stevens says to retire

PROBLEM: Cleveland Cavaliers owner Dan Gilbert has revealed that he received "vile , disgusting" voicemails after star LeBron James called President Donald Trump a "bum" on Twitter . 
James ' message last weekend came in response to Trump rescinding an invitation for the NBA champion Golden State Warriors to visit the White House . 
Gilbert said he had not told James about the voicemails . 
James also commended NFL players for protesting after Trump said owners should fire any players who kneel during the national anthem . 
Gilbert and James have patched up a complicated relationship . 
Gilbert infamously wrote a letter to Cleveland fans criticizing James for leaving as a free agent in 2010 . 
The owner was later fined $ 100,000 after he accused James of quitting in the playoffs during an interview with The Associated Press . 
Earlier this week , James said he did not regret his comment about Trump . 
"Me and my friends call me that all the time ," James said during a news conference prior to the opening of Cleveland 's training camp .

SOLUTION: LeBron James ` bum ' tweet led to racist messages , Cavaliers owner says . 

PROBLEM: UNITED NATIONS (Reuters) - The United States will seek to boost its case for United Nations action against Iran when Security Council envoys visit Washington on Monday to view pieces of weapons that  U.S. Ambassador Nikki Haley  says Tehran gave to Yemen’s Houthi group.
 Haley  and  her  14 council colleagues will also lunch with President Donald Trump  the U.S. Mission to the United Nations said Friday.
 Haley  said last month  she  was exploring several U.N. options for pressuring Iran to “adjust their behavior”. But  she  is likely to struggle to convince some Security Council members  like veto powers Russia and China  that U.N. action is needed.
Diplomats  speaking on condition of anonymity  say  Haley  has not signaled which accountability option  she  might pursue or when.

SOLUTION:
U.S. seeks to boost case against Iran with U.N. Washington visit