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Roanoke Firearms owner John Markell holds a Glock 9 mm pistol. Photo: Don Petersen / AP

A Harvard Business School study found if all states adopted firearm purchase delay laws, an additional 910 lives could be saved each year, per CNN. The study suggests mandatory waiting periods allow a "cooling off" period for heightened emotions that could lead to crimes and suicide.

Why it matters: Most of the 33,000 gun-related deaths in the United States each year are suicides. Between 2006 and 2014, there were 190,396 people sent to the ER for handgun-related injuries; 55% of those were assault victims.

The studies: The researchers looked at the number of handgun-related homicides between 1970 and 2014 in states with mandatory waiting periods and those without, and found the laws were associated with "a 17% decrease in gun homicides and a 7% to 11% decrease in gun suicides," according to CNN. They also analyzed the impact of the Brady Handgun Violence Prevention Act — federal legislation that enacted a waiting period from 1994 to 1998 — and found a similar reduction in homicides related to firearms. The findings on suicide reduction need further research, the authors said.

The laws: 16 states and the D.C. have state regulated waiting periods. Hawaii requires two weeks for all firearm purchases, while Florida and Iowa require only three days for handgun purchases only, according to the Law Center to Prevent Gun Violence.

Go deeper

Kevin McCarthy's rude awakening

House Minority Leader Kevin McCarthy. Photo: Mark Wilson/Getty Images

Kevin McCarthy is learning you can get torched when you try to make everyone happy, especially after an insurrection.

Why it matters: The House Republican leader had been hoping to use this year to build toward taking the majority in 2022, but his efforts to bridge intra-party divisiveness over the Capitol siege have him taking heat from every direction, eroding his stature both with the public and within his party.

The next big political war: redistricting

Illustration: Aïda Amer/Axios

Democrats are preparing a mix of tech and legal strategies to combat expected gerrymandering by Republicans, who are planning to go on legal offense themselves.

Why it matters: Democrats failed to regain a single state legislature on Election Day, while Republicans upped their control to 30 states' Houses and Senates. In the majority of states, legislatures draw new congressional district lines, which can boost a party's candidates for the next decade.

31 mins ago - Politics & Policy

Vaccinations, relief timing dominate Sweet 16 call

Sen. Joe Manchin (D-W.V.) speaks during a news conference in December with a group of bipartisan lawmakers. Photo: Caroline Brehman/CQ-Roll Call, Inc via Getty Images

Vaccine distribution, pandemic data and a cross-party comity dominated today's virtual meeting between White House officials and a bipartisan group of 16 senators, Senator Angus King told Axios.

Why it matters: Given Democrats' razor-thin majority in both chambers of Congress, President Biden will have to rely heavily on this group of centrist lawmakers — dubbed the "Sweet 16" — to pass any substantial legislation.