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].

[EX Q]: Sen. Bob Corker (R-TN)  speaks with reporters after announcing  his  retirement at the conclusion of  his  term on Capitol Hill in Washington  U.S.  September 26  2017. REUTERS/Aaron P. Bernstein
WASHINGTON (Reuters)  - U.S. Senator Bob Corker   the influential Republican chairman of the Senate Foreign Relations Committee  said on Tuesday he will not run for re-election  a blow to a party already struggling to balance divisions between mainstream and more populist wings.
An establishment Republican   Corker  has been criticized from the right  and a conservative activist had already announced a primary challenge. But he was expected to keep the seat  and had amassed a $7.5 million campaign war chest.
 Corker  has ruled out running for governor of Tennessee.
âI have no idea what Iâm going to do. No idea whatsoever â  Corker  said in an interview. But he said he was not leaving out of frustration over deep party divides that have often paralyzed Congress.
 Corker  announced  his  retirement on the day of the failure of the latest Republican effort to repeal former Democratic President Barack Obamaâs healthcare law.
âI am not going to be one of the people who leaves here badmouthing what is one of the greatest privileges of oneâs life â  Corker  said.
He said he realized he was ready to retire on Aug. 24 during a factory groundbreaking in Clarksville  Tennessee  and almost announced his decision at least twice before Tuesday.  Corker  said that he made his announcement now to allow a strong candidate time to enter the Senate race.
 Corker  is the first senator to announce  his  retirement ahead of the 2018 mid-term elections  when one-third of the 100-seat chamber will be up for grabs. Tennessee is a solidly Republican state and the party  which currently holds a 52-seat majority in the Senate  is favored to keep his seat.
In his official announcement   Corker  said that âafter much thought  consideration and family discussionâ over the past year  he and his wife Elizabeth âhave decided that I will leave the United States Senate when my term expires at the end of 2018.â
 Sen. Bob Corker (R-TN)  walks away after speaking with reporters after announcing  his  retirement at the conclusion of  his  term on Capitol Hill in Washington  U.S.  September 26  2017. REUTERS/Aaron P. Bernstein
CLASHES WITH  TRUMP
In August  after Trumpâs much-criticized reaction to violence at a white supremacist rally in Virginia   Corker  told reporters in  his  home state Tennessee that Trump had not been able to demonstrate the âstabilityâ or competence that  he  needed to be successful as president.
After the exchange  the two men had an hour-long meeting at the White House this month that  Corker  has described as a wide-ranging and friendly discussion.
 Corker  will remain chairman of the Foreign Relations Committee until he leaves in January 2019. He said he wanted the panel to address issues including Secretary of State Rex Tillersonâs State Department reorganization  food aid reform  and the fight against human trafficking and modern slavery.
 Corker  said the committee would address the international nuclear agreement with Iran  as Trump faces a mid-October deadline for deciding whether to certify that Tehran is complying with that pact. That decision could force Congress to decide whether to reimpose sanctions.  Corker  would not say whether Trump had decided to certify or not.
[EX A]: Republican U.S. Senator Corker will not seek re

[EX Q]: The Court of Arbitration for Sport has confirmed that it has begun proceedings against  Russian curler Aleksandr Krushelnitckii  who won a bronze medal in curling as part of the Olympic Athletes from Russia team at the Pyeongchang Winter Olympics .
 Krushelnitckii  finished third in the mixed-doubles curling tournament  competing with  his  wife and teammate  Anastasia Bryzgalova.
News that  Krushelnitckii 's "A" doping control sample had failed a doping test for meldonium first came out on Sunday; his second "B" sample was opened and tested on Monday – and hours later  the CAS said that its anti-doping division was opening a case against the curler.
Further to a request from the International Olympic Committee (IOC)  the CAS ADD has initiated a procedure involving the athlete Aleksandr Krushelnitckii (mixed curling; OAR). No hearing date has been fixed yet and no further information will be provided at this point.
[EX A]: Formal Doping Case Is Opened Against Russian Curler Who Won Medal In Pyeongchang : The Torch : NPR

[EX Q]: At the top of the list of signers was the name of  Rep. Scott Taylor (VA-2) .
 Congressman Taylor   you may recall  was the RINO who blamed the Republican Party of Virginia’s devastating loss in the November election on President Trump’s “divisive rhetoric ” instead of the issue-free campaign run by establishment Republican Ed Gillespie and the failure of the Virginia legislative campaign committees to have an effective incumbency program for their members.
 Taylor  is a classic RINO who talks a good game when he campaigns  but betrays his constituents as soon as he gets to Washington  and his amnesty letter is a classic example of the genre.
 Taylor  wrote:
 Taylor  apparently thinks  he  was elected to represent the interests of the people of the globe and  he  forgot  he  was elected to represent the US citizens of Virginia's second district. Then again  this is  the same Congressman Scott Taylor who claims to be  like Obama  a "global citizen " as he explained on the Global Citizen website ; " Global citizenship means placing emphasis on membership of a global community  not just national identity  and acting accordingly ." Representative
Of course  what  Rep. Taylor  is not saying in  his  letter to Speaker Ryan is that the DACA program  he  is supporting was unconstitutionally imposed by former Democratic President Barack Obama  and that the “studies”  he  cites have been thoroughly discredited.
We urge every CHQ reader to call two Congressmen – their own Representative and Virginia Congressman Scott Taylor (VA-2).
The Toll-Free Capitol Switchboard is 1-866-220-0044. Tell Congressman Scott Taylor and your Congressman you oppose amnesty for any class of illegal alien and that you will oppose any Member of Congress who votes for an amnesty bill.
Rep. Scott Taylor (VA-2)
[EX A]:
Make Two Phone Calls To Stop Amnesty