Trump just comes out and says it: The GOP is hurt when it’s easier to vote. Democrats “had levels of voting” in their stimulus proposal, Trump said, “that if you ever agreed to it, you'd never have a Republican elected in this country again.” https://www.washingtonpost.com/politics/2020/03/30/trump-voting-republicans/

Another from the Dept of Saying It Out Loud: “This will be extremely devastating to Republicans and conservatives in Georgia,” Ralston, a Republican from Blue Ridge, said…“Every registered voter is going to get one… This will certainly drive up turnout.” https://www.ajc.com/news/state--regional-govt--politics/georgia-may-primary-still-for-now-amid-pressure-for-delay/K1wboFdcY1z7xYt7pa11MO/