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A Democratic senator is recapping the year by tweeting details of every mass shooting that took place in America in 2015.
Sen. Chris Murphy
Christopher (Chris) Scott MurphyWe need laws to stop gun violence, but we need to stop glorifying it, too Senators in the dark on parliamentarian's decision Democratic senators call on Biden to support waiving vaccine patents MORE (D-Conn.), a staunch gun control advocate who was in office during the 2012 Sandy Hook Elementary School shooting, called it his “year in review.”

For my 2015 year in review I’m listing all of them - every injury and every death in every mass shooting this past year.
— Chris Murphy (@ChrisMurphyCT) December 31, 2015
Seeing all these shootings together you can’t help but wonder, how is it possible that we can see this carnage and continue to do nothing?
— Chris Murphy (@ChrisMurphyCT) December 31, 2015
#ICYMI Here’s a 2015 year in review - 372+ mass shootings, countless lives forever changes by gun violence. Day by day, month by month
— Chris Murphy (@ChrisMurphyCT) December 31, 2015
2015 year in review - America is shaken by a summer filled with gun violence. Congress continues its inaction.
— Chris Murphy (@ChrisMurphyCT) December 31, 2015
2015 year in review - 372 mass shootings and counting. Zero substantive action in Congress
— Chris Murphy (@ChrisMurphyCT) December 31, 2015
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Murphy said he is using data compiled by shootingtracker.com, which defines mass shootings as any in which four or more people are injured.
According to statistics compiled by USA Today, which defines mass shootings as any in which four or more people are killed, there have been approximately 21 mass shootings in 2015.
Gun violence has become a polarizing issue this year, with President Obama unapologetically declaring that he is willing to politicize the issue in order to advance gun control legislation.
The deadliest mass shooting of the year occurred Dec. 2, when a married couple stormed a San Bernardino, Calif., office building and killed 14 people.
Authorities said one of the shooters pledged allegiance to the Islamic State in Iraq and Syria (ISIS) during the attack.