PHOENIX — Kari Lake won the Republican Senate primary in Arizona, NBC News projects, officially setting up a critical matchup against Democratic Rep. Ruben Gallego. 

Lake, a staunch ally of former President Donald Trump, was running ahead of Pinal County Sheriff Mark Lamb 54% to 40% with roughly 82% of the expected vote in. Former news anchor Elizabeth Reye placed a distant third. 

Lake advances to the general election for the seat being vacated by independent Sen. Kyrsten Sinema against…