Do you think there is voter fraud ?

YES!!!!!!!!!!!!!!!    I am in California and I believe several districts were flipped by selective Ballot Harvesting.  There are many cases of various types of fraud in the last election.  There are scads of cases of non-citizens voting and one instance of a House member here who was literally encouraging illegal aliens to vote. 

Of course not Republicans need some way to scare their constituents back under the tent!

Yes, there were attempts to rig the election at every level you can imagine and then some.

Here is a shorty list exclusive to the 2020 election: http://2020election.jottings.website/

I don't think that list contains more general things like rigged voting machines: https://www.youtube.com/watch?v=t75xvZ3osFg

Why don't we hear of more cases of vote-rigging? Well, the GOP were forbidden from making any such claims for 36 years, ending in 2018, by law! http://archive.is/iRlz1

Is there any reason to suspect there's anything wrong about big boxes of unfolded mail-in ballots with only Bid n checked and all the down ballot stuff left blank being rolled in to polling places in the middle of the night?

Coming from the gop yes, they project 

Your poor understanding of the Democrat party platform does not prove voter fraud.

Don't forget tRump encouraging his sheep to vote TWICE.

Elections are based on what the voters want not what the parties want.  There is and was absolutely ZERO evidence of any widespread voter fraud.  Every single court challenge was dropped because of lack of evidence.  Time to move on.

I believe, no, I KNOW you're a fraud and that orange, seditionist, traitor you support is a fraud.

Yes 100% I do!