https://en.wikipedia.org/wiki/2020_Republican_Party_presidential_primariesAlso googling "Illinois Republican Primary" shows that Trump is running against the guy shown in the graphic aired on that local station, so it's a thing.
So you can say
(1) they had fake/rigged results for both primaries
(2) they had fake/rigged results for the Democratic primaries, and "mocked up" results for the Republican primaries
(3) they had "mocked up" results for both primaries.
So
(1) involves a massive cross-party conspiracy, that also involves many in the media
(2) is presuming your conclusion, so it's circular logic
(3) makes sense and is plausible
Also, it's ridiculous. If they gave exact figures for the number of votes cast in
both primaries then what if either primary has a turnout that's way lower or higher than expected? They would just never do things like this, it would involve bringing way too many people into the conspiracy. Half the TV station would know it's a thing for a start. Conspiracies operate on a "need to know" basis. Even if the station was super anti-Bernie there wouldn't be any value in involving them as co-conspirators by giving them pre-rigged figures: they're going to report whatever you tell them regardless.