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Gov. Greg Abbott says it would be unconstitutional to raise the minimum age to buy a weapon like the one used in the Uvalde school shooting. Families of the victims want Abbott to call a special session of the state Legislature to pass new gun laws. Their top priority is raising the age to buy an AR-15 and similar semiautomatics from 18 to 21. During a campaign event on Wednesday in Allen, Abbott said existing court cases have already found such a law to be unconstitutional.