ONLY if their allies are involved!

It's actually a matter of semantics.

First off though I'm confused to your alliance of "parties in the US administration." The current administration is that of a singular party, as past and present, and in future as the structure initially dictates should continue.

It's the manufactured chaos from both establishment parties of our government that choregraph a diverse misunderstanding of the election cycle and crimes that can be found within, onto the public, with the help of our MSCM.

We have states that run 2 different types of election processes. Some within a group caucus style process and others on a majority vote usually referred to as a primary. [diffen.com] Each of these, as we highly discovered in 2016, although not totally beholden to 2016, expose their own problematic issues of deception wavering within inaccuracies.

Then there's the process of voter registration to participate. While the republican party is mostly the guilty entity that conducts widespread voter suppression. They do this by various means. One way is something they conduct called interstate cross checking where they designed a false match lists of "suspected" double voters from other states using names that seem similar. Purging people form the registration if they haven't voted in a chosen number of years. Sometimes deceptively because they didn't return a card sent in the mail that looks like junk mail. [gregpalast.com]

While this is a problematic issue republicans have been using for years the democratic party used this tactic, along with others, against Sanders in the 2016 primary cycle. While also conducting highly questionable acts and procedures in states that vote within the caucus style voting process against his supporters and campaign workers at the voting sites.

These are essentially acts of voter tampering related to "rigging" in which I often argue should not be related to voter fraud. Which by legal means would actually be when someone illegally votes for or as someone else or multiple times. Or illegally as in a non voter status for the various reasons this can occur. I argue the term fraud is a construct used by the establishment parties and media to create the sense of confusion the public is entrapped in as part of a diverse misunderstanding on purpose.

We also have the voting machine aspect of failures and vote switching. Which there are reports of in every election cycle, as this last one, yet never fully investigated. And is getting actually no coverage today.

Therefore my conclusion is that they are all rigged. We have a significant amount of evidence of voter tampering/suppression, various complaints especially towards machines, unethical procedures at caucuses, etc etc, which highly effect a certain voter group, mainly left and progressives, that are swaying our country to the right. We have a government that refuses to confront this issue, more concerning within the democratic party that losses their support structure. And a media that collaborates with them rather than conduct their Forth Estate rights to confront the issues. One can only realistically sense the seemingly obviousness of a rigged system. On a citizenry concern it's how they condition the deception towards distracting us from looking in the right direction.

@William_Mary
Wow well I will tell you what, when you publish your evidence and win your pulitzer prize I will be in the front row applauding your efforts and congratulating you on your reforming of the broken electoral system.