Kari Lake has won the Republican nomination for U.S. Senate in Arizona, setting up a fierce battle against Democratic U.S. Rep. Ruben Gallego for a seat that could be crucial to deciding Senate control. Lake on Tuesday defeated Pinal County Sheriff Mark Lamb, who had contended he was more electable and the best candidate to secure the border. But Lamb ultimately struggled to raise the money needed to make his case to voters. Gallego is running unopposed in the Democratic primary for Senate. Lake, a former local news anchor, has built a national profile in former President Donald Trump’s “Make America Great Again” movement.