Dem's want unsecured elections. Everything they do and talk about is to that end. They cover their tracks with talk about Russia meddling in elections while all along wanting to make sure the only security about the elections is that they control the rules so they win.
In its purest form we should have election day and voting in person. Some exceptions should be military and some Americans serving overseas in government roles. Increase polling locations and staffing. If you don't make it to the voting booth then tough. This 90 day stuff and mail out voting, mail in 7 days after the election, etc, creates cheating.