Pennsylvania’s Supreme Court upheld the state laws that prevent municipalities from enacting their own laws to regulate firearms, saying in a unanimous decision Wednesday that the city of Philadelphia and advocates against gun violence failed to show the laws are unconstitutional.

Sen. Bob Casey (D-PA) has not conceded his race against Republican Dave McCormick, even though multiple outlets have declared McCormick the victor.

The ruling is a major victory for Republican Senate candidate David McCormick, who holds a very narrow lead over Democratic Sen. Bob Casey ahead of a statewide recount.