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On Tuesday, the U.S. Supreme Court refused a challenge to California's 10-day waiting period for firearms purchases, Reuters reports, which is are "intended to to guard against impulsive violence and suicides."
The backdrop: According to Reuters, the Supreme Court hasn't taken up a major firearms case since ruling in 2008 and 2010 gun that individuals have a right to own a gun for self defense. In 2017, the top court also kept in place a California law banning concealed-carry permits unless the applicant can show "good cause" for having it.
The details: California, Hawaii, Rhode Island, Illinois, Minnesota, Florida, Iowa, Maryland and Washington, D.C. all have waiting periods to give gun buyers a stretch of "cooling off" time and officials time to run background checks.