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].

[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.
[A]: Formal Doping Case Is Opened Against Russian Curler Who Won Medal In Pyeongchang : The Torch : NPR


[Q]: Image copyright Getty Images Image caption  Prime Minister of Canada Justin Trudeau  departs a press availability at the Canadian Embassy in Washington
In 2017   Canadian Prime Minister Trudeau  learned a lesson about the power of social media.
 Trudeau 's January tweet "isn't necessarily the sentiment being held by a lot of Canadians".
 Mr Trudeau  ended 2017 in an ethics quagmire partly of  his  own making.
Meanwhile   Trudeau 's finance minister  Bill Morneau  is struggling with his own ethics troubles.
A mid-December poll by the Angus Reid Institute indicated that for the first time since his election   Trudeau 's approval ratings had dropped below 50%.
 Trudeau 's ratings are still strong for a politician  but Kurl says there is "perhaps a little bit less adoration and a little bit more exasperation with the prime minister".
As the two rival leaders find their feet - and if  Trudeau  and  his  ministers keep handing them easy ammunition - 2018 could also prove a rough ride.
[A]: The tests facing Canada's PM Justin Trudeau in 2018


[Q]: The Trump administration has told lawmakers that  it  wants $18 billion over the next decade for the initial phase of a Mexico border wall  laying out for the first time a detailed financial blueprint for the president's signature campaign promise.
"President [Donald]  Trump  has said  he  may need a good government shutdown to get  his  wall. With this demand   he  seems to be heading in that direction " said Sen. Dick Durbin of Illinois  the ranking Democrat on the Senate Judiciary Committee's immigration subcommittee.
Though  Trump  ran for office on a promise that Mexico would pay for a border wall  the spending plan indicates American taxpayers would fund it for at least the foreseeable future.
 Trump  has told Democrats  he  is unwilling to reach an agreement unless they fund  his  wall plan  among other measures  but the CBP document is the first time  his  administration has sketched out what that might cost.
Democrats have repeatedly said they will not pay for a wall. Even though on a year-over-year basis the CBP request would not represent a dramatic funding increase over current border spending levels  it would represent a long-term commitment to a physical structure that  Trump  would be able to claim as a political trophy.
" Trump  can have a shutdown fight over  his  stupid wall that pleases the nativists in  his  base  or  he  can have a breakthrough that pairs the Dream Act and border security so  he  can brag  he  did something Obama couldn't get done.  He  can't have both " said Frank Sharry  executive director of America's Voice  an immigrant advocacy group. "This move by the White House does not bode well."
 Trump  has said  he  may travel to San Diego to inspect the prototypes  which range in height from 18 to 30 feet and combine different formulations of see-through steel bars  concrete slabs and metal spikes.
[A]:
Trump seeks $18 billion to begin building border wall