We both did mail-in voting while in the service and more importantly; while overseas. We got the ballot, we filled it out and signed it. If someone else filled out the ballot for you - their name and signature had to be placed on the ballot also. We then put the numbered ballot in the numbered envelope and sent it in to be counted. The discussion about printing is silly. All ballots are printed, so the distribution of the ballots is the only logistics for discussion. Whether you go to the ballot or it comes to you - that's it.
Before mom passed, she became blind, but she still voted. As her caregiver, we would have a cup of coffee and I would read the ballot to her and indicate her wishes. The session was videotaped (mom's signature had gone from a beautiful catholic penmanship cursive upbringing to a scribble). We didn't have to video tape it, but if there was ever a question - it was on tape.
The bottom line is: The 26th Amendment ratified in 1971 says, "The right of citizens of the United States, who are eighteen years of age or older, to vote shall not be denied or abridged by the United States or by any State on account of age." There was no need to put race, creed, color, etc. because that had already been established. And so, the questions become, "1) How to ensure that happens and, 2) How to do it while preserving the integrity of the vote."
There is premise for both parts of the question. How to ensure it happens is laid out in the second section of the amendment. "The Congress shall have the power to enforce this article by appropriate legislation." End of story. It doesn't matter if one agrees, disagrees or doesn't understand. If the House votes to have mail-in ballots. That's the way it is. Deal with it. And the fact is - it's what the voters on both sides are asking for.
With the current pandemic and what's happened in Wisconsin to both voters and poll workers creating a CoVID hotspot, it becomes more important to address this now than wait until we get closer to the election and the logistics to be more an issue. Write to your US representatives and tell them your thoughts on the matter - AND, ask them to get busy.
With regard to the second part of the question; preserving the integrity of the vote should be a matter addressed whether it is write-in or electronic. As we both know, digital can be manipulated as easy as a write-in ballot. As mentioned in an earlier post; use a model. We have that. Colorado. Colorado forwarded only 0.0027% out of 2.5 million ballots for fraud investigation. Find out how they do it and ask congress to emulate that.
As to the argument about which party will benefit more - no one knows. Colorado’s increase in turnout didn't benefit one party over another. The increased turnout in Colorado in 2014 for both parties was almost identical. However, Independent voter participation increased. If Congress enacts mail-in voting and preserves the integrity of the vote - end of story.