Rep. Maxine Waters, D-Calif., is facing scrutiny from a conservative watchdog group for possibly violating fundraising rules in a slate mailer, with the group requesting that Waters’ campaign committee be audited as a result. The Federal Election Commission received a complaint Monday from the National Legal and Policy Center claiming that Waters, her campaign, and a pro-charter school group called Families and Teachers for Antonio Villaraigosa violated federal election law. The complaint claims the group paid $25,000 for Villaraigosa to be featured in the Waters mailer when he was running for governor in the Democratic primary earlier this year. Although...