 It returned Congressional races to the closed primary system.In 2010, the legislature voted to revert federal elections to the nonpartisan blanket primary system with the passage of House Bill 292, which was signed into law by Governor Bobby Jindal on June 25, 2010.Since Louisiana's primary is virtually identical to the Washington state primary system, which was upheld by the US Supreme Court in "Washington State Grange v. Washington State Republican Party" (2008), it appears to satisfy constitutional concerns.