Our friend Steve Hayward at PowerLine makes the case:
McCain should resign, and allow Arizona’s Republican governor to appoint a replacement so that the Senate is back to full strength. This is especially appropriate given the narrow Republican majority in the Senate. His absence is causing majority leader Mitch McConnell significant difficulties on close votes. (By the way, Arizona’s current Republican governor, Doug Ducey, is up for re-election this November. What if he were to lose? Then McCain’s seat might be flipped to Democrats if he passes away after the first of next year.)
Why won’t he? “McCain’s extreme vanity gets in the way of putting the public interest ahead of his towering ego.” So even if he should resign, odds are he won’t. What a pity—not just for Arizonans but for the country.