So you care about voter integrity? What effect on voter integrity is there when the president of the United States goes around spreading lies about the integrity of the voting system?
The effect may be large or it may be small, but there will be an effect. If you truly cared about voter integrity you would care about this too.
I agree with you that his view fraud tends to be committed by Democrats is something that can be determined to be true or false. Unfortunately for our president, most fraud is committed by Republicans and not democrats.
The single largest case of voter fraud in this countries history happened in North Carolina in 2018. That was committed by a Republican.
If you investigate the voter fraud instances in Trumps own listing you will find that the majority of them are committed by Republicans.
Combine this information with the efforts by Republicans to suppress the vote and you can see the problem. In North Dakota, the Republican-controlled legislature passed a law that required all citizens to have a physical mailing address to be able to vote. Sounds resonible right? Well, this was after a Democrat won a Senate election in that state thanks in large part to the Native American population. Most Native Americans live on reservations in that state and part of living on the reservations is a lack of physical mailing addresses.
Nothing about having a physical address is going to make voter fraud less likely. It's plain as day that Republicans are just interested in suppressing the votes of people who vote against them.
So are you arguing that the president has a greater right to free speech than Twitter?