What is the process to replace Max Miller if he steps aside in the face of abuse allegations?

Rep. Max Miller (R-OH) is facing growing questions about his campaign for a third term representing Ohio’s 7th Congressional District, as allegations of domestic abuse made by his ex-wife have engulfed his reelection campaign. The controversy intensified after renewed public attention to allegations made by Miller’s ex-wife, Emily Moreno, during their ongoing custody dispute. She…