The details of the problem will change from year to year but the problem is that you have to be ahead of the curve, not behind it.
Yes, pubs will eventually embrace vote by mail and ballot harvesting and all of that.
Problem is, by then dems will have enacted voting with a downloadable app on your phone and probably that app will come pre-installed on your phone. Maybe with the dems already checked off (little joke there, or not).
Worst than that, you will have tens of millions of illegals who just crossed the border made eligible to vote in US elections even if all of them are foreigners. You will have the Democrats in power in perpetuity. Just look how the Democrats wiped out the Republicans in California. The RINOs did not help themselves by conniving with the Democrats. Now, there is only a few RINOs left. They will be gone like the dinosaurs soon enough.